TTC after BC

Ally

I have been on BC since I was 15 (the pill). I just recently stopped taking it the start of November.. I began tracking my period and watching for my fertile days. December was month 1 ttc with no luck. The app was off about 5 days for AF. Has anyone else experienced irregular cycles after stopping BC?? How long did it take to regulate again?? Hoping January is our month for my BFP!!!!