Another paranoid FTM post...

Let me start off by saying I'm 31 weeks on tuesday and haven't had a day without worrying incessantly since I found out I was pregnant at 4 weeks. I seriously feel like I can't eat, drink, or do any activity without a threat of harming my baby. Today I went boating, thinking nothing of it. I of course didn't tube or wakeboard, and we obviously hit some waves, but nothing that knocked me up out of my seat. Now I'm worried I caused a placental abruption somehow. Would I definitely know if this happened? I also got sunburned despite applying sunscreen, and used aloe with lidocaine, which I read after the fact is not advised in pregnancy. How much could this harm the baby? I just feel like I'm doomed no matter what. I am so worried about hurting my baby and I can't relax like ever. I have 10 weeks left, and I'm so afraid something will happen before he gets here.