Hi, Umm I'm 17 And Experiencing Spotting Of Blood And

Hi, umm I'm 17 and experiencing spotting of blood and this only started a few weeks after I began gym in my school and it only happens every so often and it used to not be continuous but, this has happened for two days now. my period doesn't start for a few more days but I'm feeling the normal cramping in my stomach when I'm starting my period but when I check the pad I have on, there is very little blood on it but nowhere near my normal flow and I have done some research and it says it could be a sign of vaginal or ovarian cancer I'm scared but don't want to tell my mom or go to a doctor to get it checked because one of the tests they perform is putting their hand down there to check and I don't like the idea of that one bit. Can you please help me decide what to do?