should I be worried?

This month I've been very sexually active. In the beginning of the month I had sex with a guy who has a vasectomy. Anyways I wasn't worried then, but now I'm worried because I had sex with a guy who isn't fixed and we used the pull out method and I'm supposed to get my period tomorrow, but I have a pinkish discharge right now... idk what to think. Is my period just super light this month? This is the first time this happens to me.