I Have Torn My Calf Muscle! Please Read Whole Description Before Answering!?

I was riding my horse at a riding lesson, he jumped over a Cavaletti fence and someone cut my stirrup lengths so I fell off the saddle to the front and landed on the ground, and broke my calf muscle.
At first, I didn’t know it was a broken calf muscle. But then I went to a doctor for check up, he said to take a quick x-ray at another hospital, so my sister supported me by driving me to the hospital as well, as I couldn’t walk properly to a hospital 1 hour away, anyways, they gave me an ultrasound shot thingy, and the back of the calf muscles have been torn.
I can’t walk properly, I have to limp and I look like a sick idiotic grandmother The doctor said to try stretching out my legs every now and then and also take the Nurofen tablets. It hurts like hell whenever I try to move it or walk properly. I try stretching out my legs every now and then, but it doesn’t work or even heal the pain.
The doctor said it will heal finely on it’s own by me taking medicine tablets and doing such stretches, but I see no improvement
I need it to HEAL QUICK because school starts in like, 3 days and my parents would force me to attend school, no matter what injury I had!
I need ways to make it heal as QUICKLY AS POSSIBLE! Please help!