5 days after my period i began spotting. it has been 3 days now and when i wipe there is blood. what could this be btw i have been excersising heavily

Menstrual cycles: It is common for some young women to have irregular cycles. In your case, it is also more likely to happen because you are very athletic. It can also happen if you gain or lose weight, are using birth control pills, or have an eating disorder. I would track your cycles to see if it happens often and see your doctor if you notice that it becomes more irregular.