Possible miscarriage?

I got a positive opk on Dec. 7th so I’m pretty sure I ovulated on the 8th. Two weeks later I started bleeding, totally thinking it’s my period. Two weeks after that I got some very light spotting which made me think…”hmmmm ok something is up, I’m supposed to be close to ovulating again not getting another period”. So I took a test and it was a very strong positive. Went to doctor and they sent me for bloodwork. Levels were low 360hcg. Then went for more bloodwork 5 days later. 340. Which indicates a miscarriage most likely, but here’s another annoying part. After my dark positive, I took another pregnancy test the next day and it was only a faint line. Miscarriage (I thought). I then tested every day for the next 5 days and the line got stronger and stronger everyday and my pregnancy symptoms are progressing too. I’m so confused. This is 4th pregnancy, and I’ve had 1 miscarriage before, so I know when I’m pregnant and my body is telling me I’m progressing and things are changing. I have more bloodwork coming up and it will confirm things for me. I just can’t let go of the pregnancy test lines dipping dramatically and then increasing daily. That, plus my symptoms, makes me wonder what is going on…??? I know it’s probably a miscarriage coming but my gut and body are telling me no. Super confused. Can hcg levels dip and rise? Probably not…