SO and i have been ttc for 4 years. Last april i was diagnosed with hypothyroidism and PCOS. I have been on metformin and synthroid since then. In october i started fertility meds first with clomid. I am on my 2nd round of femarathis cycle. (After 3 unsuccessful clomid ones) Finished last pill day 7 last thursday. No BD last 2 days so i know its not his seed. I have never had this before. I usually O on CD 16. Last cycle i was minitored via BW, OPK and ultrasound and was told CD 13 i O'ed. (Wow... never that early.. i was excited! Only for AF to show up :( )Didnt have this last cycle. Advice please?