Miscarriage?

I woke up this morning and went to the bathroom. My underwear had blood in it and then I looked in the toilet and it was all red. And I bled heavily most of the day before I decided to go into the ER. All they did was take a blood test and told me it says I’m pregnant and they sent me home and said they’d test again in 2 days to see if I’m still pregnant. I was hoping they’d at least do an ultrasound or something. I had a really big blood clot as well. I’m so sad and anxious. Is this most likely a miscarriage? Is there still a small chance my baby is okay? I’m suppose to be 7 weeks pregnant today..