Can exercise cause spotting? I'm 18 and never worked out until this week and I noticed spotting a couple hours after I was done working out. There's no way I'm pregnant because I've gotten my period 3 times since the last time I had sex, which was protected sex. I've gotten my period always around the second of the month so I think I'm ovulating right now. Just wanted to make sure a little spotting in between periods was normal and if it's caused by exercise. Oh & I've also had a little bit of cramps. Thank you!