Bleeding but still pregnant!?

So my LMP was 9/10 and I started bleeding on Sunday (10/16) and my beta HcG was 178, nothing found in the ultrasound. Cut to today, still nothing on the ultrasound (too early), but my beta hcg was 534! My progesterone is 6.5 so I’m gonna start medication asap. My thyroid was found to be struggling, so I started medication this Monday.

My doctor has ruled out a miscarriage, but is concerned with an ectopic or a normal pregnancy. I feel no discomfort and I’m cautiously optimistic.

Does this sound familiar to any of you out there? Why am I bleeding so much? I’m filling 2-3 large pads a day.