Can't stop worrying

I have my first doctor appointment on Thursday. I'm not sure how far along I am yet but I'm guessing 4 or 5 weeks. I just can't stop worrying about something going wrong. Before having a successful pregnancy with my daughter I had 2 missed miscarriages. After my ddaughter I was on the depo shot for a year stopped and tried to ttc but no luck for 2 years. Until this weekend I got my bfp! I'm so scare something could go wrong I've heard so many bad stories of pregnancies after coming off the depo shot. I just want to have a healthy pregnancy. I want to be able to go on with my day without worrying to the point I want to cry 😔