Bleeding and cramping 😢😭 first pregnancy

Jasmine
I woke up from a nap today with cramps in my tummy. So I went to use the restroom and when I wiped i saw blood. So I went to the hospital and my hcg levels were 400,000 which is not normal for someone who is 7 weeks and 3 days pregnant. They said since my levels were so high that I couldn't get an ultrasound and sent me home. And asked me to come back in a couple days and if my levels haven't doubled by then, I did miscarry. I'm so sad right now and I'm still cramping and bleeding. Idk what to do? This is my first pregnancy and my boyfriend and I were so excited!Â