Stoped bc pills now dr said i'm having withdraw bleeding is that my period or the start of my period?

Definitions: Often we call it a "period" anytime we bleed. But really it is something that happens spontaneously about two weeks after ovulation has occurred in the absence of a successful fertilization. "withdrawal bleeding" is a shedding of the uterine lining in response to medication, and has nothing to do with a normal menstrual cycle. In general, the first day of a period is the first day of a cycle.