Irrational Fears

I have these constant irrational fears that something I'm doing or not doing has hurt the baby. I think this constantly, almost every day. Like "omg, I forgot to take my prenatal vitamins yesterday and the baby has brain damage now thanks to me!!!" Of course, intellectually, I know the baby is perfectly fine and my thoughts are completely irrational. I'm eating healthy (somewhat), not smoking or drinking, very very limited caffeine intake (seriously alot less that what the doctor says I can have), not taking any medications - not even over the counter ones, and avoiding the foods I'm supposed to avoid. So, like I said, I know my fears are somewhat irrational, but who said a pregnant woman was ever rational or made sense?!