Ovulation after stopping BC?

Meredith • Mother to my rainbow baby girl 10/21/16 and 1 on the way due 1/4/19 🌈🌈
Hello.. Stopped BC a couple weeks ago and waiting to get AF. Is it possible to ovulate before I get my period? I'm charting BBT (steady), doing OPKs daily (blank circle) and watching CM (wet and clear - no changes). Any thoughts or ideas appreciated! Thanks ladies :-)