hi good afternoon doctor. i don't know what kind of a doctor to help my problem. i have a pain in my left side of my butt, down to my thigh and knee.i was working a sales associate in the department store. i'm standing in 7:30 hours, when i take my lunch break at 45min.i was setting down and when i get up. i can't walk because of the pain, and also when i was go to sleep i can't get up, it so painful, i always crying.please can you help me? thank so much.