I Hurt My Knee In Dance About A Year Ago

I hurt my knee in dance about a year ago and have had troubles with it but for the most part it has been better. The past two weeks it has been so bad I feel like crying! It feels like someone is ripping something above my knee and an aching above my knee. I tried pain killers and ice but its not working! I want to go to the doctors but my mom says im over exaggerating. So I backed off a little, should I tell her I really need a doctor? Thanks!