The recumbent bike is a good idea, but 17 minutes is a long time. How long were you riding it for before?

Gabapentin is really good for neurological pain. That's why most people take it. I used to take a TON of it for my pain, but it no longer works for me for that purpose. It can cause a sedation and put you at a greater risk for falls. Since this is a new med for you, maybe that is what is causing the falls/close calls? It takes a little while to adjust to any dose.