miscarriage

I recently had a miscarriage in September. My husband and I were not trying to get pregnant again yet. I was on the pill. December comes and I have to get surgery December 28th. My period comes December 4th. I get surgery and in January I'm waiting for my period. I was taking Percocet lacitives. I thought my period hadn't come because of the surgery and pain medicine. So I decide to take a test after a week of my period being late. And low and behold it's positive. Well now 2 weeks later I'm 7 weeks and I'm so paranoid that I'm going to have a miscarriage again. I know I can't prevant it. If it's going to happen it's going to happen. I feel like my symptoms are disappearing but I also think it's in my head... the worse part is I probably won't get an ultrasound for another 3-4 weeks.