Scared of the unknown

I am currently 9w 1d pregnant with my first pregnancy. My husband and I had been trying for almost 2 years before we got the positive results! I found out I was pregnant 4 weeks ago and have 2 more days until my first ultrasound. I can’t seem to relax! I check my underwear every time I change, the tp every time I use the bathroom and every ache scares the hell out of me! I have only experienced a very small amount of brown discharge a couple of weeks ago, but other than that it’s been pretty normal. I still experience nausea/morning sickness and boobs are still slightly sore. I’m still TERRIFIED that there may not be a heartbeat when we go for our first ultrasound…does anyone else deal with this and if so how do you talk yourself down from those thoughts?