She just doesn't notice you are always a selfish prick because of her rose colored glasses.
ha! Great response.

SO PLEASE for the love of god I think the best thing to do is tell your guy your on your period when you are
After the first month you should know. Although I have forgotten a time or two. Like, "Damn, why is she being such a b!tch?" Then I look at a calendar, and it all makes sense.