Scared FTM

I have to be honest, this is my first pregnancy and I am freaking out just a tad. I found out last week that. I was 7wks pregnant making me 8wks today. What if my baby stopped growing, what if something is wrong. I was diagnosed with endometriosis at age 12, and I was told that I may never be able to have children. I think this is what scares me the most. I’m scared and worried. We have an appointment on the 30th for an ultrasound so I am praying our baby is okay but i just can’t shake this ugly feeling.