6 weeks

Jamia
I am 6weeks today but this picture was taken at 5 weeks 3days. I'm kind of scared because I went to the hospital for cramping my levels went from 52 to 3000 in a week. They gave me a ultrasound  and seen the sac but no baby nor heart beat. Should I be worried. This is my first pregnancy and I feel like I'm getting really big. Is that normal? Should I be worried?