So here my story ,

I tested positive 2/24 . The line was very faded but it was there . Based on my last period at the time I was 9 weeks . 2/27 I started bleeding . I got blood work done and my HCG levels were at 17, I also got a vaginal ultrasound and no sac was found . The doctor said I either already had a miscarriage or I was actually barely pregnant like 3 weeks . I have gotten blood work done ever 48 hrs since and my HCG level continues to double. However on Thursday I got another vaginal ultrasound and still no sac found . I also got blood work and my HCG levels are at 4,554 .they did notice I had a retroflex uterus .

Has anyone experienced anything like this before ?