Hi mama, breakthrough bleeding like that is actually common pag nagsisimula lang ulit ng pills, especially if may time gap, it's not necessarily pregnancy, but since you're worried, best talaga na i-check with your OB para ma-confirm if okay lang ang pills mo or if kailangan mag-adjust, at para ma-ease your mind din! You're doing great taking care of family planning, kaya mo yan, just get that peace of mind from your doctor at you'll feel better.