I've been on the same pill (Gianvi) for three to four months now and I have four sugar pills for when I'm supposed to be on my period. But my period's are never in line with the sugar pills, usually they start a day late and go on for more than four days. Does this decrease the effectiveness of the pill and increase my chance of getting pregnant? I had sex without a condom and he ejaculated inside me, that's the only reason I'm concerned since I've never done that before. I take the pills religiously at the same time every day and haven't missed a pill ever.