Constant Fear Somethings Wrong

I am in constant fear that something is wrong with my baby. I have yet to get an ultrasound but heard the babys heartbeat around 10 weeks. 2 weeks later, I still have pregnancy symptoms like nausea & vomiting but just not sure thats enough sometimes. My stomach has been the same size & I'm just scared all the time sometging is wrong with my baby. Is that normal? Overthinking?