How is everyone dealing with their pregnancy anxiety?

Hey all! I just recently found out I was pregnant, according to this app 5 weeks but according to the way my OB's office calculated 7 weeks - but I haven't had my first appointment yet to confirm. I am like constantly anxiety stricken that something terrible is going to happen to this pregnancy resulting in a miscarriage. My first appointment isn't for 3 weeks so I can't even get some relief from the doctor until then.

How is everyone handling not freaking out every 10 seconds?