iphone 4s - cant connect to home wifi

For months my iPhone 4s, now running iOS 6, has been having trouble connecting to wifi. It didn't bother me too much until now, when I can no longer connect to the wifi at home. I reset my network settings, but still no luck. I know the password by heart and have checked it, the password isn't the problem. It will either say "incorrect password" or "unable to connect". On my macbook, ipad, kindle, as well as another iphone in the house, there are no problems connecting to the wifi. We have fios but because of the recent storm and just regaining our internet a few days ago, I'd prefer not to mess around with the router. It is so frustrating to me that I cannot connect to wifi in my own house all of a sudden. I don't want to update to iOS 6.0.1 until I have resolved this (not to mention you need wifi to update anyway). I have seen a lot of other people complain about this iOS 6 wifi glitch, but mine started before I updated. Previously, it would not allow me to connect to most outside networks, home worked fine. Please, if you know of a solution to this problem, let me know before I go over my data plan!