Fertile mucus but negative ovulation test

Angel Rogers • 24 years old • Wife [9.9.17] • 2 blighted ovums 8/17/18 & 12/7/18 •TTC our rainbow 🌈 I have PCOS and blood clotting disorder

I took femara this cycle day 3-7 with 2.5mg

I’ve taken it 2 times before same dosage and ovulated day 16 first time and 14 second time. I am on cd 15 today and negative ovulation test.. test line is not even close to the control line. Cycle day 10 was close to being as dark as control and after that it got lighter.. but I have got this fertile mucus today. Anyone have this happen?So confused with my body it’s frustrating.