My boyfriend and I have sex quite a bit. There was a long period (3 Weeks) of no sex. So the last day of my birth control (Before the week I don't take any pills), we had sex three times (With a condom). Fast forward three days and my period still hasn't came. I have little discharge but no blood. My diet hasn't been the greatest, I hardly eat. Which is my own fault. My boyfriend and I recently started working out together and he really pushes me, especially when running. I get about 5-6 hours a sleep a night. Any advice is appreciated. Thank you.