Progesterone level 10.6 at 7dpo

[LadyBuggy4]

I am new to this site. Decided to join since ttc can be a LONG and sometimes lonely journey. Just a little background- i have PCOS, my dh(27) and I(26) have been ttc for almost 4 years. I am clomid resistant so this is our 2nd cycle on Femara (cd 3-7). Went for a follicle study cd 11 (10mm & 12mm) then went back cd 13 for a follow up follicle study (18.6mm). Did IUI on cd 15 (10/23). I started spotting only for about an hour yesterday morning (11/1-9dpiui). Got my cd21 progesterone results this morning- 10.6. She said it was low. Can anyone shed light on normal levels? Anyone have success with low numbers? I am super bummed out. thanks!