Walking is getting harder

Questions about foot drop, balance, falls, canes, and Ampyra

Is this foot drop, weakness, spasticity, balance loss, or a combination — and does the treatment differ?
Is my balance from MS lesions, weakness, vision, vertigo, or something else? How do we tell?
Are walking changes a sign of progression, or could this be a relapse that will improve?
Should I try Ampyra (dalfampridine)? What are the odds it works, and how will we know? What are the trade-offs?
Would an AFO (ankle brace) or electrical stimulation device help my foot drop?
Should I see a physiatrist or a PT who works with MS? Would a gait analysis help?
Would aquatic therapy or recumbent biking be safer than treadmill work?
When is the right time to use a cane or walker? Patients often wait too long — would I benefit from one now?
I've been falling. What can we do to lower my fall risk — home modifications, gait training, anything else?