Pinpointing cycle

KK
The last 3 months I had positives on my OPK tests and had BMS afterwards with no luck in conceiving. I am starting to get frustrated because my BBT doesn't really change much... CM doesn't change a lot during the month mostly stays creamy and doesn't get egg white like. CP never changes is always high will change from firm to medium and soft but never comes down even on my period. I am wondering if my body just has a hormone issue and if I should see my doctor. I talked to her back in February for my preconception appointment and she said just to try for a few months. This month my OPKs have been negative and haven't been consistent with what Glow is telling me should be my most fertile days. I'm wondering if I could have ovulated earlier or later this month as I am somewhat irregular and never know when my period will come sometimes it's early sometimes it's late. Can someone give me some insight?!