Period Probs??

So I skipped my period in February because it would've happened during Valentine's Day, and had daily brown spotting until now. I took my third placebo pill today and still haven't gotten my period nor have I had any symptoms of it coming (okay besides the zit on my forehead). 
Also related: my SO and I have had condomless sex a few times but he always pulls out. I've been on my BC since September. Could my body just be re-regulating??