I Have This Pain In The Upper Back Thigh (right

I have this pain in the upper back thigh (right leg only). I'm a cook so I'm on my feet 8 to 10 hours a day after about 5hours the pain is really instance an I start to limp when I walk and after that point the pain stays for hours (12 to 48) it is infecting my work productive. I do have back pain l4&5 is herniated really bad an I have nerve damage to the lift side of my lower back. thank you for your time