I have had unprotected sex on and a couple days after my period (very light pink discharge a couple days after my period and still had sex) but I am on the pill and I've taken it every night with the acception of an hour or two late or early taking it... could I be pregnant or worried if I am? ... should j take plan B? is it normal to still have a little color coming out but it's not actual blood?

Need answers asap