Concrete stuff to read about detox pathways, methylation depends on folate, and since some folks don't make folic acid into folate well, that can be a big deal for some people. Methylation and glutathione conjugation are the two main pathways for excreting metals, though there does tend to be a cascade effect in people with health issues--one pathway get slowed down, nutrients depleted, another pathway is impacted, and so on. Wuwei's links discuss a lot of the nutrients on this page, but if you had to focus, I'd focus on those two.http://tuberose.com/Liver_Detoxification.html
Fibro symptoms are serious, it's good to investigate and problem solve now. Some folks find pain decreases if they normalize their vitamin D levels (I'd use the range from the vitamin D council), so that's a good one to work on, and I think your supplementation level is reasonable (I've been taking 10,000 IU for several months now, I plan to test at some point, but it's been delayed a bit).
If your amalgams are part of the problem (some people get fibro from mercury toxicity), you can improve your health now, and definitely IMO make a better environment to grow a baby. I also read once that there's an unusually high overlap between susceptibility to lyme and metal toxicity, just in case you ever start down one path and don't get the results you want. We aim for WAP-type eating, some days better than others, I think that's a wise move. I found physical health stresses depleted tons of nutrients in me, including A & D (and zinc and folate and...).
I've read of omega-3 supplementation on the order of 9 or 10 grams per day being therapeutic for things, I just wanted to point out that most people don't need that to feel good, so something's different with you, but you've already twigged to that. I think that level of zinc is also rational, I've been taking 75 mg/day for quite a while myself, and my kids are each getting about 50mg/day. We've living on supplements, I do hope to be done someday.
Take a look at this doc on vitamin C flushes?http://www.perque.com/pdfs/Pt_Ascorbate_Slush_FIN.pdf
I wouldn't do them while pregnant, but they have been an excellent help decreasing my circulating toxins, I did them while breastfeeding and they were not bad, and likely good, for my nurseling. I got my vitamin C daily need down from about 44 grams per day to the 5-6 grams that seems physiologically normal for adults. Taking bowel tolerance vitC every day helps give an excretion path to what's already circulating, I think that's going to be a lifelong thing for m. I'd try to find something that you can take around 5 or 6 grams per day, I haven't tried acerola or amla yet, I use sodium ascorbate and I'm not sure if bowel tolerance is different either way.
I think the Doctor's Data Hair Elements test is a good all-purpose hair test. It's been used a lot for both detecting mercury (sometimes mercury's very high but mostly when it's a problem it's low, you look for other things being odd), as well as looking at regular mineral levels (which aren't always interpreted in a straightforward manner, but there's a large body of data and knowledgeable people to use to help with that).
folate/MTHFR... good link to read...http://www.detoxpuzzle.com/mthfr.php
It's not _my_ issue, but with fibro symptoms, that's more serious than I've had, so it's possible it could be yours (or google to read some of Andy Cutler's book Amalgam Illness on phase 1 and phase 2 detox pathways, I think the tuberose link above discusses that as well, fast phase 1 and slow phase 2 leads to nastier intoxication symptoms than just slow phase 1 and slow phase 2, which is me).
I would vote that candida and allergies are possible, but I'd still look for a reason that _you've_ got this and the neighbor lady doesn't. Know what I mean? When I first became hypothyroid, I eventually figured out that it was due to massive vitamin and mineral deficiencies, but I just assumed my pathetic diet was to blame, but I didn't really eat worse than many folks, yet I felt horrible and was hypo. It took a while to ask more questions, why was *I* having this problem, and not the lady down the street? Celiac's also something to rule in/out (maybe based on family/personal health history, maybe testing), it malnourishes people so that they're unusually susceptible to crap that other people deal with fairly well. I don't have that, but gfcf for the mercury has been very good for me--it frees up my detox bandwidth (the gluten and dairy leak from my gut and my liver was busy excreting them and getting even more behind on the other stuff), and so I can make progress with the metals. GFCF isn't just for kids.
Took me a while to be ok with that. And even if the root cause isn't metals, so many people here seem to have problems with those foods, for so many varied reasons, it's crazy.
That was a lot of links, but it sounds like you've got a good support system, other knowledgeable people to work with, and you've got a really good start at figuring out what's going on with you.
If you want to investigate mercury more, the autism mercury yahoo group and the frequent dose chelation yahoo groups are both places to read, if you searched for pregnant or pregnancy, you'd find discussions there as well.
I'm planning to get a hair test sometime in the spring, maybe summer, plus vitamin D. Serum retinol is only helpful if it turns out low, if it's in range, it doesn't mean much, so I don't know how to check vitamin A. I'm supplementing and doing the guess/double-guess thing there. I'll re-do the taste test thing as well--there are 8-mineral kits out there that do the taste test for other minerals besides just zinc, they're around $30 for the kit (and then I'd use other minerals to actually supplement myself, so I think the kit would last a long time).http://www.mothering.com/discussions....php?t=1118978
It's the one that JaneS mentions on this page.
eta: sometimes I just go on and on and on....