Cervical Fluid Before Period I Am Consistently Ovulating 1 Week Before My Period. My Doc Says This Is Impossible. Has Anyone Heard Of This?

I am consistently ovulating 1 week before my period. My doc says this is impossible. Has anyone heard of this? - cervical fluid before period

I TTC for ten months and during this period were methodically tracking my bike. My basal body temperature, ovulation pain, vaginal discharge and blood tests the day of ovulation 23rd Then bang on my period is 30 days. I referred to a specialist clinic, said it was impossible, so I pasted in the Clomid cos he did not know what to do other things. I think there is someone out there that they found?