How Can Severe Arthritis Be Treated?

Back pain, I have suffered for almost a year. Was told after physical therapy, chiropractor and limit work at work, was told to retire because I needed to get rest. Retired almost 3 months and it s worse. Can t walk less than 250 ft without it hurting, making a bed hurts it, and standing in one place hurts it, sitting too long hurts it. They say it s probably arthritis but it stops hurting when I stop doing the things that causes the pain. If it was arthritis wouldn t it continue? I can t enjoy my life with this pain. I ve taken ibuprofen till it s killing my stomach. So I just suffer. Any suggestions? I was a CNA and worked in a nursing facility and was hurt at work.