What did i do to my knee?!

What did i do to my knee?

I was playing tag with my friends in the woods and i was running from my best friend. and all of a sudden my knee just started hurting. it hurt so bad that i almost fell down. i stopped running and my friend caught up to me and she thounght i was just tired so she tackled me because that is how we tage each other. and her tackle knocked me to the ground. and i could not get up so she helped me and i used her as support for my knee to get to the house but that was 20 minutes ago. what do you think is wrong with it and what sould i do. I can put alittle weight on it but is is EXTREMLLY PAINFUL. and it is not swollen put is very sensative to touch.i tryed to wrap it but it was to painful for me to make the bandage tight. what do you think i did to my knee and what sould i do to help it?i live alone and my car broke down and no friends can take me.and i have a locked gate so noone can get in but i cant walk out there to unlock it. i have crutches and a bandage it is to painful to wrap it?

you might have twisted it, I did that when i was younger, it feels horrible, mostly all you can do is eleavate it, ice it, and keep it wrapped, but maybe around it, not on the knee itself if it is hurting too much, and go to the doctor.