Does anyone else have extreme back pain? I currently am working full time as a cocktail server and…

Does anyone else have extreme back pain? I currently am working full time as a cocktail server and am on my feet for 7-8 hours a day. Usually my back starts to hurt after 6 hours. I'm looking for some advice as far as ways to alleviate the pain. I only have 8 weeks left but it gets worse everyday.