Second Miscarriage?

So, I’m feeling pretty confused and frustrated right now, but to summarise in August I had an MM, and then had a positive pregnancy test on NYE.

I get my bloods done and hcg is showing at 5 weeks, which is where I should have been.

Fast forward to 5 days ago - I should be 7 weeks and I start spotting, nothing irregular - however, today it’s slightly heavier so I see my GP. My GP is concerned and gets me to do an urgent ultrasound.

The ultrasound tech advises she can’t see anything, not even a sac and seemed surprised I had a positive hcg result when there was no indicators of a pregnancy.

So, back I go to my GP and as we don’t have the results from the scan yet, he’s referred me onto more blood testing as it doesn’t make sense.

I feel like my body has betrayed me twice, I’m bleeding heavily now, but is this a miscarriage? Or is it just my body thinking it’s pregnant, I’m so mad and sad.