Is it just me?

So I've been on the pill for a couple months now and every so often I stop taking it for a month to see how my period acts. So far my periods seem to be back to normal for the most part except it seems I may be ovulating during my period. Is that even possible? Could another egg drop that quickly and cause this right at the beginning of my period? it seems to be happening with EVERY period so I know it can't be a change in diet or anything like that. Am I the oknly one experiencing this??