I am currently on 150 mcg of levothyroxin, my general doctor told me last week that was a level given when the thyroid just doesn't work. My son is going to be turning one in a few days. I also go to a specialist for my thyroid b/c my general doctor had found a cyst in my thyroid. My specialist has my blood levels tested about every 6 - 8 weeks. My specialist has told me very firmly that if I have a positive pregnancy test to call her ASAP, so that she can then do blood work to make sure my levels stay at normal; I would assume in your case it would be your diagnosing doctor you should call if you became pregnant. While I was pregnant I had blood work about every 4 weeks I think it was.
Usually every time I get blood work my meds have to be adjusted. My understanding is once I am at the normal levels then I can get pregnant (not that we are trying now, but I am physically ok thyroidwise to get pregnant). Before my thyroid levels were normal I got pregnant and miscarried at 6-8 weeks, b/c my body didn't have enough of the thyroid hormone to sustain the pregnancy. We did try for about 2 yrs to have a baby, in that time was the miscarriage; but I am not sure how much the thyroid was a problem once my levels were normal.
I feel the only part I can control it to take my meds as instructed (in the am when my stomach is empty, I take it at 6:30am when I wake up, then eat 1 hr later, but I don't take any vitamins until 4 hrs later at 10:30am...this way the meds are most effective). Because of my situation I also stay on top of getting my levels tested so that my levels can stay normal. I do struggle with not loosing weight like I would like to. But pretty much I am healthy.
I was not able to breastfeed, I just couldn't produce more than 2 oz in a 24 hr period; there is some thought that it might have been b/c of my thyroid or b/c he had trouble latching on. To my knowledge if I did breast feed my thyroid issue wouldn't have effected my son at all. My specialist knew I was trying to breastfeed and didn't mention about interaction with the meds in the milk.
I had started to look into the natural route, but my doctor mentioned that some herbal stuff anyone can take and feel good, but it can then effect the heart and bones. So I am going to just stick with what I am doing for now. Maybe down the road I might investigate the nateopath route.
I hope this info helps you. Let me know if I can be of any more help. I feel like I am more of an extreme case, so I hope I didn't go into too much detail.