I have a incompetent cervix loss at 20w in aug. my cycles are regular but never notice ewcm. do i ovulate? i'm 21 and ttc for 5months.

Ovulation: Cervical mucous is, in no way, a diagnosis for ovulation or lack there of. Having regular periods represents much more accurately the fact that yes, you are ovulating.

Infertility: There are a lot of factors here. Most likely you are ovulating if you are having regular cycles each month. If you have a cervical issue, you may not see cervical mucus when you ovulate. It would depend on the reason for the cervical incompetence.