Sorry to hear about your fall
It seems that the kind of fall makes a difference (it does for me). If it's severe enough, I think the stress is what gets the numbness/tingling/confusion to intensify. It will last from a little bit to weeks depending, again, on how bad the fall was.
And remember that stress will trigger just about anything, including a flare. So, do some relaxing, maybe some breathing meditation and think positive thoughts.
The breathing meditation is on my 'to do' list as much as possible because my emotions are wacky right now. Meditation helps me stay balanced (not easy for this crazy ol gal!).
I don't know if this helps but I do hope your increased symptoms retreat soon!