I too, have a hard time separating my fibro symptoms from my neuropathy and arthritis symptoms. Although, I can often tell when it's a nerve problem, so that isn't arthritis, but neuropathy and fibro both involve nerves.

My feet ache when I walk too. My left thigh sometimes feels like someone is punching it with every step. I do realize though, the walking is my physical therapy and it must be done, otherwise things will only get worse, so I keep at it. Some days are ok though, so that helps with the bad days, just knowing there will be good days too.