jen, i have weak legs also. at times i am not able to walk at all. i had knee surgery last yrs and whent thro 6wks of PT and sill to this day i am not able to walk thro a store, i have to use a wheelcair. i have also had weakness in my left arm for awhile but not its starting in my right arm.
i do drop things and at times cant feel i am holding something. its odd and yes its very scary. i have always had great mussal tone, was into all sports in school, then trained horses and dogs. i now have rotties and from them you get a lot of upper stringth, but if you look at my arms now they look old to me.
maybe its lyme or something else i cant say for sure. i do know now i have nueropathy in my legs. thats all i will every know of for sure as they will not be doing that test on me again. and they wanted to do it on my arms. nope not happen..lol
no your not alone in this. but know this i am here for and with you if you ever need me :)
still looking for answers.
Remember that advice if free, its your choice what you do with it. :)