My lower back, near my butt hurts excruciatingly!?

Me and my friends were doing a jumping contest. I repeatedly jumped as high as I could stretching as much as I could. All of a sudden, my lower back near my butt cheeks begin hurting like someone had crashed their car into it. i didn't stretch and I'm a fairly chunked/bulked guy: 5'75 at 185LB. Is this... show more Me and my friends were doing a jumping contest. I repeatedly jumped as high as I could stretching as much as I could. All of a sudden, my lower back near my butt cheeks begin hurting like someone had crashed their car into it. i didn't stretch and I'm a fairly chunked/bulked guy: 5'75 at 185LB. Is this something I should get a doctor to see, emergency room, or it will pass?????
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