I've been on the pill for over a year now and i am almost never late taking my pills. i always start my period or rather withdrawal bleeding on Tuesday like clock work and i stop Saturday night or Sunday morning. this month however i stopped on Thursday. so i only bled heavily for two days and now I'm getting a spot here and there for the past 2 days. what does this mean? could i be pregnant.? the only time i had sex last month was like a week before i started taking the placibos.