What Causes Chronic Pain In Legs When Diagnosed With Psoriatic Arthritis?

I have had chronic pain in both legs for more than two months. It is not subsiding. I have tried about all the NSAIDs available OTC: Naproxen Sodium (Aleve™ or Generic) (which works best for me, but it slow to take effect), Ibuprofen (works faster, but is not long-lasting), Acetominophen (works very little for me, and upsets my stomach), Aspirin (began to take when I suspected DVT in order to help thin my blood but now suspect my own Dx, given both my legs from the glutes down to my rear calves hurt equally, and I ve read that DVT is normally found in one leg, especially the calf). I treat with heat daily, and repeatedly with electrical heating pads (Walgreen s) to alleviate pain. I walk stairs up and down to the basement in order to improve circulation as well as stretching when the pain allows. I know I need to move and elevate, but moving can be difficult, especially in the mornings, for hours on end. I need pain relief and a long term solution. I have been Dx as having psoriatic arthritis, and have suffered one bout of uveitis in my left eye about two years ago. I m at wits end as to how best to personally treat this now. Please help.