I Had Hcg Levels Checked Last Sunday 11/23 They Were

I had hcg levels checked last Sunday 11/23 they were 437 I had them checked again Wednesday morning 11/25 it was at 441 so I had ultrasound which showed nothing so i had more work done Monday 12/02 hormones still rise after being told I'd miscarry at 691 they see in my tubes or uterus my uterus was enlarged and endometrial lining was 5cm I'm guessing lol so what could on oh and I've been bleeding and sporting since the Saturday before the first quant was done