So scared but hopeful

Beth • Due 12-13-15. Had a mc last year super nervous. Hoping this will be my miracle baby.
I had a mc last October at 6 weeks. I am now 12 weeks pregnant and fear everyday. I have not had any symptoms throughout this pregnancy. I saw the heartbeat at 7 weeks. I go Thursday for the Doppler. I fear everyday. I haven't been cramping or spotting but I am so scared of a missed miscarriage please pray it works out. I am driving myself crazy.