Help! What was your first period off of the pill like?

What was your first actual period off of birth control like? I quit my pill 10/20 and started a normal withdrawal bleed 10/23. I figured my period may start 28 days later which would have been 11/20. However, I got cramping and bleeding 11/14 that was super light for 3 days. I thought it might have been implantation bleeding so I started testing shortly after that and have come up negative on all tests. So now I'm thinking maybe that short bleed I had was my cycle clearing its throat to come back? Should I consider that short bleed 11/14 my period? I would like to know because I want to start my opk charting tomorrow if that was my period. I want to hear what other women had happen when they quit birth control?