Need some advice

K • Two babies in heaven 👼🏼 🌈 one beautiful son born 1-21-2020.

So I went Monday to get a blood draw. It was negative and HCG was less then 1. That night I took two tests and they both had faint positives but were there.

So then Tuesday comes I have even more positives.

Wednesday comes took 5 tests even a digital BFP.

Today another BFN.

My doc wants me to retest my HCG tomorrow and she said it has to be in the 1000s.

Can that even be possible ? From Monday to Friday ?