First, hang in. I am well into my third year of pain that is largely debilitating, and it has been almost 12 years since I was able to exercise at 100%. Plugging away is the best option.

Second, I find it helpful to think in terms of "what can I do?" instead of "I can't do all this stuff." When I stop and ask myself, "what can I do?" I am usually surprised at how long the list is. Examples: walk, jog, tai chi (carefully), meditate, various lower body stretches, self massage, and more. None of this has been a cure, but much of it does provide temporary relief.

Third, this is a wild guess, but have you looked into diet? I have a couple of friends who have had pain issues that improved with certain diets. This sort of thing is highly individualized and remains on the outer reaches of what modern medicine would take seriously. Still, shooting in the dark is better than nothing.