how many ultra sounds should I be getting?

I'm know I'm super early, I'm 8 weeks 4 days and it's my first time being pregnant but I always expected to have many ultrasounds. Last one I had was when I was 6 weeks pregnant but only because I felt discomfort and was scared something was wrong.
Is there anyway to have them do another ultrasound? I'm constantly freaking out something's wrong and in my mindset, first trimester should also be as important as any other trimester because this is when you really have to take care of your body so your baby can grow.
Is it normal to not get ultrasounds? Just to simply check on the baby?