Worried about mmc :(

Jasmine • Married to the love of my life this past January! Now praising God for the little one growing inside of me!
I have an ultrasound next week- but of course I'm worried about the possibility of having a missed mc. I had an ultrasound done at 7 weeks and the baby was fine and we saw the heartbeat. Should I be worried ? I feel like the days are taking forever until I know for sure things are ok.