After numerous positive digital tests I took my first blood test this past monday (1 day after missed period, about 16 dpo ) and my hcg was 45.

Took it again two days later , Wednesday, to see if they doubled and it dropped to a 36. My Dr. said it's not viable and stop taking the progesterone he prescribed me, which I only had prescribed one day prior). He said call him when I get my period since it is a chemical pregnancy in my 4th week..

I took a third blood test two days later which was today, Friday , just because i had a feeling and it just came back at a 74, so it doubled from two day's ago's dropped level of 36...

can anyone explain this to me as not many have heard of hcg dropping then rising? I'm supposed to be 5 weeks today but not sure if I am just behind.. I hate to stop taking the progesterone (only took it 3 times between wednesday's test and today's test) if somehow this baby is viable.. but also am nervous to take progesterone if baby is not viable and delay my period.. very confused what do you think or anyone with this experience??