Could it be possible my Progesterone levels are to low?

Hello, my last cycle I got a BFP at 12dpo, only to find out my HCG levels weren't doubling and I miscarried at 5wks. I was wondering if my progesterone levels could be low and that would be part of my problem. Last month was my first cycle on Femara I had used Clomid 3 months prior, with no success. I have a 1 year old son I concieved naturally the first try, and when I found out I was preg. with him I was immediatly put on Progesterone suppliment because they said my levels were a little low. I have been charting BBT and this is what my chart looked like this past cycle.

CD1-97.2

cd2- 96.5

cd3-96.5 (start femara)

cd4-96.8

cd5-96.55

cd6-96.55

cd7-96.5 (end femara)

cd8-96.5

cd9-96.5 (low fertility montior reading

cd10- 96.5 (FM low reading)

cd11- 96.7 (fm low reading)

cd12- 96.6 (fm low reading)

cd13-96.46 (fm low reading)

cd14-96.5 (fm low reading)

cd15-97.2 (fm high reading)

cd16-97.0 (fm high reading)

cd17-97.2 (fm high reading)

cd18- 96.5 (fm high reading)

cd19-97.2 (fm high reading)

cd20-97.0 (fm peak reading)

cd21-97.5 (fm peak reading, 1dpo)

cd22-97.5 (fm high reading 2dpo)

cd23-97.47 (fm low reading 3dpo)

cd24-97.6 4dpo

cd25-97.4 5dpo

cd26- 97.72 6dpo

cd27- 97.75 7dpo

cd28-97.7 8dpo

cd29- 97.33 9dpo

cd30- 97.77 10dpo

cd31- 97.77 11dpo

cd32- 97.57 12dpo (positive hpt)

cd33-n/a

cd34-97.93 14dpo (started a progesterone suppliment the night before because blood test showed progesterone level of 10)

cd35- 97.92 15dpo

cd36-n/a 16dpo

cd37-n/a got next blood results back hcg only went up to 31.5 from 23 believe I will miscarry

cd38-spotting (miscarriage)

I have a apt. with my OB on the 19th, and I am going to show her my chart as well, but I read if your temps. don't go significantly higher than your coverline after ovulation you could have a problem with low progesterone. What do you think? Fertility friend stated my coverline was at 97.32