9 weeks an waiting on AF?

Annelise • 26. I have a 4 year old and 3 year old sons. Expecting a baby girl Dec 11, 2019
Okay I know this might sound so dumb but I'm 9 weeks pregnant and it's been confirmed by a doctor. But since this would be the week I normally get my period I'm like so nervous I will an find out I was never pregnant. Even though I have symptoms and everything else I still get scared. Anyone else feel like this? Or am I just crazy?