33 yrs old, never had spotting during ovulation. over last year i've had spotting & cramping after exercise, not during ovulation. causes? cancer?

Listen to your body: Bleeding can occur after vigorous exercise if you modify the exercise and still have bleeding it is possible that a benign fibroid near the lining could increase risk of bleeding. Chronic use of ibuprophen can also increase vaginal bleeding, cancer unlikely but if you have eliminated these causes have a check up. Make sure you are eating a healthy diet and stop Protonix (pantoprazole) if you can by doing so.