First pregnancy and I'm terrified of miscarrying

Okay ladies I need some advice. This is my first pregnancy, I'm due November 27 and I'm terrified of miscarrying. I was told at 21 I would never get pregnant then in October my new doctor said it was possible but I needed to get to it. Thankfully I'm with a amazing man and we love each other more then I thought possible for adding a bundle of joy was really what was next. Here my issue, everyday sense I found out I was expecting I get overwhelmed with the fear I'll miscarry. Then I read post in here and hear of others miscarrying. Can anyone give me any advice on how to calm this fear so it's not my every thought. I have endo and I know that can cause complications as well. I just need something so I'm not scared that everything little thing I do is gonna cause my little gummi bear to go grow full term