Scared to miscarry again

I had a miscarriage in November of last year at 7 weeks. I started bleeding immediately after sex. I know sex didn't cause the miscarriage because after the fact I found out my blood work from that morning had already shown a decrease in my hcg levels. I am now 8w 5 days pregnant again. I have already had two ultrasounds and so far everything is fine and we saw the beautiful heartbeat. However, I am still terrified when my husband comes close to me. I try to do the wifely thing and try to relax and enjoy sex but after a few minutes I just can't wait for it to be over so I can go make sure I'm not bleeding. It's terrifying.  I don't want to feel this way and I know sex doesn't cause miscarriage. What's wrong with me?