I dont think that you have anything to worry about. Your already in your 3rd tri. And nothing has came up then I think you should stop worring. Everybody thats pregnant is so worried that something could be wrong with the baby but usually it is always fine.
When I was about a months into my pregancy, I had this just horriable toth ache and I needed to get a tooth pulled. My midwife typed up a note to give to my dentist stating that if x-rays were needed to go ahead. I didnt end up needing them but I know that my midwife wouldnt have approved it if it wasnt save. Im sure your little buddle of joy is fine and good luck to you.