Anyone know what happened?

Petranella

So supposedly I miscarried this past Friday. Woke up, had spotting and then period like bleeding but no clots. Had bleeding on and off yesterday and some today.

Friday, I went to the ER and they said my Beta was only 21. They did a transvaginal ultrasound and said they didn't see a baby. I was assuming I was in my 5th week. They scheduled me to get another blood test done tomorrow to see if it dropped. However, I kept taking pregnany tests and the line did get darker. A few days after I stopped taking them, I had which supposedly was a miscarriage at 27 dpo.

Could I actually have been pregnant or is there something else wrong with me?