I think I’m having a miscarriage.

I went to the Er for light spotting they said everything looked fine, viable pregnancy, there was a heartbeat of 163. I woke up today with dark brown spotting and it looked weird like coffee grounds. Now I was just sitting in bed and I felt this weird gush and I ran to the restroom and I’m bleeding heavily. This is exactly what happened with my first miscarriage. I don’t even know how to feel..