Pain in the Lower Back.?

[John Smith]

PLEASE READ!!!
I need help. I like doing backflips. i did alot of them and i was fine untill i started doing them off one story roofs, or of a tower of people. and after afew high backflips my back started to hurt. i didn't pay much attention, it started off hurting when i was doing backflips. now i had the pain for a month, and i stoped doing any kind of backflips, and it starts to hurt like crazy when i walk, or play soccer.

Can anyone please tell me what possible things could i have done to my LOWER BACK. the SPINE nurts. my friends cracked my back, stretched me. didn't help. and i also haveto squat at school. which is making it worse.

It feels like a nerve in the spine hurts or something. like the pain is always there but every 2 seconds u feel it kicking in really hard.

if anyone knows how to fix this? or what could i posibly do to myself, i will love you =) 10 points if u really know what you're talking about. thank you.