Question About Sore/Achy Feet?

I've had sore achy feet for years. I've had 3 pairs of custom orthotics made by Podiatrists, & taken several Anti-Inflammatory meds for this problem. They all have worked for a while, & then my foot pain comes back with a vengeance. It's like my feet feel better & then they get used to the meds or orthotics & then they no longer help.I've tried everything off the shelves in stores with no relief. I've spent Thousands of $$, & wish I had every dollar back, because nothing has helped. Can anybody out there relate to my problem, & does anyone have any long term solution or is this something I'm gonna have to live with forever. I stand & walk on concrete floors for 12 hour shifts & I'm miserable. Anybody?