Have you thought about seeing your gyn? Do you 0ften have such irregular periods, that they would come in two weeks? Otherwise I would just think you were ovulating around the 16th, and the discharge is from that. But I agree with Flooded, don't take chances, be responsible, we did not burn our bras in the 1960's for you girls nowadays to not know what your options and act on them. Sisterhood is... well, I forget the slogan...