How Can Severe Pain In The Legs That Worsen At Night Be Managed When Diagnosed With Arthritis?

I have pain in my right thigh & goes down to knee, pain is worse at night, cannot sleep hardly because of it, I sit all day at a computer, I do get up every hour to stretch but sitting all day makes it worse I have seen a spine doctor who said it was severe arthritis, another dr gave me injection in my lower back which did not work & another doctor said I needed surgery. All I know is it is getting harder for me to do things and not sleeping because of pain is getting to me