When I found out that I was six weeks pregnant I was drinking 1-3 glasses of white wine with dinner about 3-5 nights a week. One of those nights I drank more like five glasses (the whole bottle) and tossed my cookies (I don't usually do that). I have worried and worried and worried that my child will grow up and have trouble learning to read and lagging behind in schoolwork...
I don't know which made me feel better but I focused on how healthy I was eating with those glasses of wine; lots of salads, salmon, almonds, yogurt... and I heard a lot about other mothers whose babies are not having any learning problems who drank before they knew about being pregnant. I have to admit, I am still worried a tiny bit, but I feel way better about it than I did at first.
The other thing I worried about was before I could see the baby growing or feel the baby moving was that maybe I had a missed miscarriage. I miscarried my first pregnancy in first tri and, while I know that is common to loose the first pregnancy and have a perfectly healthy second pregnancy, I worried that it would happen again until I saw steady growth and especially when I felt movement.
For everything else that comes up, I am focusing on my excitement to be a mother finally! That helps me to let my worries go.