This is my first paleo pregnancy and there are so many differences.
The biggest difference for me between this (my paleo) pregnancy and the other two is that I have not been nearly as sick this time. I had severe nausea/vomiting, border-lining on HG, with my first two pregnancies -- had to take anti-nausea meds for nearly my entire pregnancy with both. Despite all of the puking, I still somehow managed to gain A LOT of weight with the first two as well (80 and 60 pounds), most of which took place in the 3rd trimester. We're talking 15 pound gains in two weeks.
I was still very nauseous in the first trimester and a few times randomly since then, but compared to my other two pregnancies it was a breeze. I know "they" say that each pregnancy is different and that the difference between this one and the other two could be chalked up to that mystery, but I really feel that it has everything to do with how I was eating then compared to now. Not to mention the fact that the only two times I've puked this pregnancy were when I had dairy and gluten.
My weight gain has been really good so far, too. I'm gaining about a pound a week, which is right on target for where I should be. We'll see what happens now that I just started the third trimester though, and history shows that this is when I really start gaining.
I've also had more energy overall this time around.
Besides those few things, my other two pregnancies were "text book easy" in that I didn't deal with any of the pregnancy related issues (swelling, GD, pre-e, etc) that can happen, so I don't have those to compare to.
I try to keep more starchy foods on hand like sweet potatoes because there are days where I REALLY crave carbs and veggies just don't seem to cut it. I've also caved a handful of times when I couldn't satiate that need for carbs. After the two times I puked after eating dairy and gluten, I definitely keep it gluten-free. Usually something like rice that my body is generally ok with and I don't seem to react to. I'm not really hard on myself about caving when I do, but I also try everything else I know of to try before caving and I don't have any problems with binging if I do cave. I also learned that I really needed to up my fat intake, though this might be very different for other people. I feel like if I wasn't still learning and had already figured out some of the things I figured out while pregnant, I would have done better... but that's ok.
For supplements, I'm definitely taking magnesium (Natural Calm) and because I'm still working on increasing my very low vitamin D levels I take that as well. I also take fermented cod liver/butter oil blend. I'm not very good at taking my pre-natals, but I do take those off and on when I remember. That's it. I've never been super strict very good at taking anything, pregnant or not. My blood draw for vitamin levels will be in a few weeks and I'm anxious to see where my levels are. I haven't had them checked in about a year and a half now (since right after I started eating paleo). Will be interesting to see the differences.