If there is no way to downgrade, I will most certainly buy myself another phone, because this new iOS7 is just disgusting...:( sad, very sad.
I went to the AT&T store and traded in my dinged up, year old iPhone5 for a brand new iPhone5 with (old) iOS6 on it. I restored from my most recent backup and voila, my old phone was back and the intense nausea and headache vanished almost immediately.
Upon researching this issue I found that there were reports of nausea during beta testing. It baffles me that there wasn't more effort put into trying to resolve the problem before releasing iOS 7.
In the years to come, if this problem persists with iOS, I have no choice but to consider a different phone brand all together.