So i ovulated from Wednesday to Saturday. And started spotting yesterday. I had sex on Sunday, but we use the pullout method (or oral) as BC. But I've been spotting almost every time i ovulate for the past 3 months.. Plus my periods have been really light and short for the last few months as well... And on top of that, I've been experiencing acne and back pain almost all the time. Does anyone know what this could be?