I did something to my leg?

I woke up this morning and now my right knee, calf, and ankle hurt so much I can barely walk on them. I've been using crutches to keep off of it until I can figure out what's wrong. I might have reinjured it (I sprained my knee last year) but that doesn't explain the calf and ankle pain. I was playing... show more I woke up this morning and now my right knee, calf, and ankle hurt so much I can barely walk on them. I've been using crutches to keep off of it until I can figure out what's wrong. I might have reinjured it (I sprained my knee last year) but that doesn't explain the calf and ankle pain. I was playing basketball last night, but I didn't notice any pain until today. They're not swollen or anything. Help!
Update: My mom refuses to take me to the doctor. It sucks.
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