I spend alot of time on the elliptical (about 4-6 miles every 2 days) and recently after such a workout, I came home and had the sensation of warm wetness...which of course, turned out to be bright red clotty blood. *period was over 5 days ago-I am 46 yrs old. This is not the first time this has happened..it has been 3 days now and I am still spotting bright red - it was heavier when it began. Has anyone had this happen after exercising? Would this have anything to do with endo? I had some cramping several days back..