Can someone ease my mind & calm my nerves

I have my first ultrasound on Friday, at 8 weeks, and I’m sooooo nervous! I hope and pray that there’s a healthy little babe in there with a strong heartbeat but I can’t stop worrying about a blighted ovum, missed miscarriage, or something like that. I know its only 4 days away but man I’m so so nervous!! Especially after trying for so long. How did you mamas cope before your first ultrasound and what was the outcome after being worried for so long?