All I can say is I think you're amazing.
Most of the wise words have already been said.
I don't know if either of these sites offer what you need, but you do need some help/support with your parents.
You can't do it all sweetie. Take care of YOU first and foremost.
http://aging.ohio.gov/resources/areaagenciesonaging/
http://www.seniorresourceconnection.com/