Implantation or miscarriage?

Last night I was in the ER because I had all kinds of blood in my underwear that soaked through my pants. Every time I went to the bathroom all kinds of blood gushed out,of course I am thinking worse case.

They took blood,urine,& did a ultrasound.

They found the baby and the heartbeat which was such a good sigh of relief. The doctor did say though that i could still be having a miscarriage just a super early one. I’m freaking out.

I have to go back tomorrow to give more blood so they can compare hcg levels to last nights.

What do you guys think? Anyone been through this similar situation?