What do you guys think? I'm 7 months pregnant and I sent my ex boyfriends parents a letter....?

I am not a parent but from the look of things you seem to be going through a very rough time. To be honest I don't think writing that letter did you any good. In fact it may have solidify any negative thoughts, if any, that the parents may have had about you. I don't think it's your place to reach out to his parents like this, it's his responsibility to make the connection.