I'm not sure it is fibro either, and I think that's what scares me most. I know the weakness you're referring to pretty well lately, especially in the last week. I can only do so much before I feel absolutely exhausted, and walking in my current state takes a lot of energy out of me too so I can't go far or stand long before I have to sit and rest. I can walk with the stick by stepping with my right leg first, then using my hip to pull my left leg forward and using the stick to help with balance and weight bearing while I quickly nice my right leg forward again...kind of hobbling/mostly dragging my bad leg around. When I sit on the bed with my legs in front of me though, I can't make my leg move more than raising my knee an inch or so and turning my ankle inside or outside as well as rotating my leg through rotating my hip. It's a very weird lack of use, but I'm very ticklish on the bottom of my feet and if someone tickles my left foot, I can feel it but I can't move my leg to get away from it.
I just got the fibro diagnosis last month and haven't really been treated for it specifically. I also have been diagnosed with carpal tunnel, degenerative disc disease, osteoarthritis, and bone spurs in my lower spine. I did get in to see my neurologist this morning (who gave me the fibro diagnosis) and he's sending me for more tests, physical therapy, and seeing me back in 2 months unless something changes. I'm thinking that I'm going to call my primary doctor (not the one in his office that saw me this week though) and all for a referral to a doctor that can confirm the diagnosis and actually treat it.
As far as my usual activity level, until the issue worth my leg, I worked full time and did whatever I needed to regardless of how much pain it caused, but the pain has been increasing substantially in the last couple of months. I have a lot of determination not to let things slow me down, though lately that determination only gets me so far. I'm hoping the new tests will give an explanation and a solution can be found. Sitting around the house not being able to work or do much of anything at all is driving me insane!