I'm sorry to hear. It could be many things, treatment related of not, inactivity. I was paralyzed from the waist down, just by chemo, and couldnt walk for 10 months, and had to relearn how, and still have difficulty to this day. Anyway, I had very similar chemo treatment with Taxotere, Cisplatin and 5-FU, which any of the three can cause neuropathy, and could be that. I think mine was much more than that, and chemo has a way to accelerate any co-conditions that may not occurred of occur years or decades later. When I was hospitalized, I always had leg pain in the thigh, and they always took an ultrasound, was on Coumadin, I guess to help prevent thrombosis, and other related issues. Another is the muscles may have weakened from inactivity, just three dayx bring ged ridden you can lose 50% of your strength, and musvles could hsvd been supporting any weaker ones or old injuries. I have that with my back, with a history of back trouble, but If I don't exercise, it bothers me more. These are just my examples, and could be anything, and hopefully nothing serious.

Check to see about physical therapy to recondition the body, work on leg strength, pain. I did that for a while, and helped. Good luck with everything.