Question​?

I have PCOS and currently started taking metformin 1500mg daily. I finally got my period yesterday after like 6+ months of it being MIA. Never thought I would be so happy to see Aunt Flo !! Lol I noticed the week before period started normal PMS symptoms, i took an​ ovulation just to confirm and came back positive for LH. I was checking CM but it never got eggwhite type. I don't remember having eggwhite cm ever since I was 15 or so. My question is why doesn't my CM get like that. I have been TTC for about 2 years.