I got my period late last month it didn't come until the beginning of this month and and had sex for the past three nights and i'm bleeding again?

Your hormones are in: .. flux for some reason. Irregular periods and spotting could mean you may have some hormonal imbalance that could be affected by many different factors, including age (if approaching menopause?), nutrition, illness, exercise (or lack of it), body girth, psychological well-being, stress, season, or simple fluctuations of other related hormones (thyroid for example). U should check a preg test 2.