How do I know if i have injured my MCL?

I am a competitive gymnast and last season i broke both of my ankles within 3 months. Lately i have had severe pain in the inside of my knee right where my MCL is. It mostly hurts when i am just walking around and when i sit indian style (criss cross applesauce). It has been hurting for a while and being a gymnast i've been tuffing it out and i need to know if i should see a doctor?