The anticipation is killing me

I found out I was pregnant on November 14th, I had a test at the doctor to confirm it the next day on the 15 and they said I was about 5 weeks and 2 days according to the first day of my last period. So that would make me 7 weeks and 4 days today! Well I have my first ultrasound in 3 days and the anticipation is killing me. As it gets closer I get more nervous because I’m scared and wondering if my baby is okay or not! In the beginning it’s rough because you can’t feel the baby move so you don’t know if it’s okay or not. I heard of missed miscarriages where the fetus stops growing or dies but never flushed out so you don’t know you miscarried. I don’t know what the chances of that is but I just can’t help but worry. Anybody have advice?