I'm on birth control, and it's kept my periods pretty consistent, light, little bit of dark red blood and lasting about 3 days. my period these past three days has been basically non existent, with a bit of brown discharge. I'm worried about being pregnant, but my boyfriend thinks it's impossible. the two weeks before my period I kind of fell back into my eating disorder problems.. eating little and working out a lot more. could it be my eating has caused my period to stop? I'm at the lightest weight I've ever been but I'm very worried that my b.c. failing or something crazy. help meee