Yes, it is sadly the norm to be worried like you dscribed. I was a bearly pregnant and was worried that I had damaged the baby because I spent hours and hours painting the kitchen with strong smelling tile paint,ate meat that was slightly pink in the middle, melted a sauce-pan handle and inhaled the fumes of melted plastic. The list of my worries - if they went on would be ENDLESS. My friend however, who has recently had a beatifulbaby girl, had a wonderful pregnancy because after reading two baby magazines decided that she was going to try v. hard to to worry all the way through. I wouldn't of even done aquanatel through fear of swollowing chemically-treated water when I was pregnant (which seems batty now!), and she floated around at her aquanatatel classes having moments of blissful euthoria with her unborn baby. The point is, it's the early weeks - you have a choice - you can either be like me and worry all the way through and not enjoy being pregnant or be like my friend and try your best to go with the flow,enjoy things, accept that worrying is pointless and enjoy this rare, special time in your life. Please, dont be like me!!!
Basically, birth defects happen but are statistically rare. They can happen for a number of reasons,virtually all of which cannot be helped. No-one has done studies on chemicals/fumes etc effecting nborn babies because they can't, but the consensus is that occaisional, limited exposure to fumes/paints etc doesn't cause any harm. It wouldn't be advisable to do it all the time as it wouldn't be advisable to spend allot of time exposed to chemicals while preganant. But just a one off won't effect anything. As I said earlier, I spent over two hours face to face with stinking,, fumey tile paint when I was at your stage!
People who work in professions where they exposed to paints/solvents while pregnant (such as painters/mechanics etc) have a higher instance of defects such as hernias etc. But these are people who are exposed allot.
Just be sensible, eat well, drink lots of water,limit your exposre to chemicals in cleaning products/cosmetics/nail polsih/paints and try to enjoy your pregnancy. Limited exposure wont effect anything, your GP will reasure you and tell you the same. Remember also that your sense of smell has been hightened and that is likely to make stuff smell allot stronger that it is.
Its normal to worry, you just want to do the best for your baby and that's what being a mum is all about. Just try your hardest to keep those worries in perspective and enjoy your pregnancy.
Sorry for long post!!!
Don't