Working out makes me bleed.

So i have been working out for 3months now. The first month i didnt have a prob but the past 2 months right around OV,when i work out i bleed. Its nit alot just & it goes away with in 30mins. Is exercising messing up my cycle? Or maybe am i bleeding because im OVing & working out is making it come out? I have never bleed abnormally. Always on time & never had OV bleeding...anyone have simular problem?