Anyone else feeling anxious?

I'm struggling a bit. This is my first pregnancy and I have endometriosis, I associate cramps with bad things and I am so anxious every time I have some. I expect to go to the toilet and see blood. I have quite bad sickness and I know this is meant to be a good sign but I'm just so worried. It's really getting me down, is anyone able to offer any advice? I really want to enjoy growing my little bean but I'm not allowing myself to get attached. I'm just over 6 weeks so have a while to go until my first midwife appt and scan (I'm in the UK) x