HCG slight drop then went up again

I have no idea what’s going on with my body. I went in for a 6 week ultrasound last Thursday and they didn’t see a fetal pole.

I got my hcg checked and was at 31000 then 30000 two days later. I assumed that was considered a drop and started to prepare myself for a miscarriage.

Well my doctor called me three days later and asked me to get my levels checked again and now they are at 46000. He called me today and said the slow rising isn’t a good sign and with levels so high should have been able to see something at my first appointment.

I don’t want to get my hopes up at all so I’m preparing for the worst. I go back on Friday for another ultrasound. Has this happened to anyone else? What was the outcome?