One month off birth control

So I stopped my birth control in November. Had a period. Used opk that showed I was high for 8 days but never peaked(clear blue digital). Only came with 10 sticks so may have ovulated after those days I’m not sure. If I was a 28 day cycle I was due for my period dec 9. I’m now day 33, no period, no period symptoms and pregnancy tests are negative so far. Just wondering when everyone stops birth control how long it has taken for cycles to get normal? Prior to birth control I was very regular so this is odd to me that I haven’t had my period yet.