Difficulty Walking, Icing Leg, Ankle Pain, Knee Pain

A few weeks ago it was difficult to walk on until i iced it for a few hours. All last week it wasnt much of a bother besides when running for my baseball team(really uneven ground). Yesterday it was smooshed under a basket under my schools desk(all metal). Very bothersome after, when i walked it was a limp . Today i NEEDED to run for gym and in the first couple minutes my ankle began to hurt and there was a sharp pain in my knee . I iced it a lot but was told not to do many physical things, but it doesnt hurt when i am on my toes.