Hello, years ago I suffered an acute backstrain when someone hit me in my vehicle. I was layed up for 3 months and had to go thru physical therapy. Last year someone bumped me in my vehicle as as the months went by I began experiencing backpain. Here of late the pain is bad. I went to the doctor they said after an xray that I have arthritis in my lower back. The pain shifts from the lower lumbar to the left side. I am on Naprozen and Methcarbomal for over a month and I am not getting any better. I don t know what could be causing the increased pain