For me it started long before TTC. I have never had regular periods consistently--sometimes up to 5 months in a row, other times as far as 4 months apart. I've seen gobs of doctors, never got a correct diagnosis (one told me it was PCO, but it turns out it's not), and wound up deciding doctors just don't know that much!
At slumber parties when everyone was talking periods, I'd let them assume I was regular, but I always felt like a fraud. I've always felt inferior, freakish, like I'm not a REAL girl and when they find out they'll think less of me.
In fact, when I do tell normal women about it, they almost always say I'm lucky not to have to deal w/more periods! I AM NOT LUCKY!!! I've spent 17 years worrying what's going on w/my body, worrying that I'll die if I don't bleed often enough (one dr. said that), worrying that I'll never be able to have the baby I want so much.
Last year, one of my oldest friends wrote me that she'd gotten pregnant the month after the doctors told her it was impossible because of her "screwed-up hormones". I had no idea she had any problems w/that! We talked about it recently, and I found out she'd always hidden it from the crowd, just like me...had we only known, we both could've felt less alone back in high school!! But she did give me hope that I can conceive without all the drugs those doctors claim I "have to" take. We'll see....
Hang in there, everyone!