I'm going crazy over here! So afraid of having a miscarriage

Courtney
Have my first appointment made for 11/2! I'll be 8 weeks then. I can't get out of my head that something is not right. I'm trying to think positive, but I'm almost expecting there to not be a heartbeat. I don't feel pregnant other than sore boobs and being tired. No weird food aversions, cravings or sickness. No spotting or cramping which I thought was great until I read about missed miscarriages.
I've had so many friends have miscarriages that it has made me so paranoid and put doubts in my head. I just can't stop thinking about it! Grrrr. Anyone else freaked out and scared??