I don't know what its called but my cum has red in it i don't know if its blood or not but its not my period please help?

Vaginal bleeding: Even though it's not your period, vaginal bleeding like this can be caused by fibriods, endometriosis, dysfunctional uterine bleeding, or even pelvic inflammatory disease. Usually your doc will take a complete history, do a pelvic exam, and will consider an ultrasound. Treatment, like most things, depends on the cause of the bleeding. A pregnancy test is the first step. Best of luck.