Overheated

I bought a new little girl last Friday, and she seemed to be doing really well. Unfortunately, yesterday when I cleaned her bowl I discovered that her heater overheated her bowl. It just had one of those sticker thermometers on it, so all I know is that it was over 82 (top of the thermometer's scale) and that it felt very warm to the touch. Since then she has stopped eating and just floats by the surface. She is mostly unresponsive unless I give her a reason to move. She was in a very small bowl, so I have moved her into about a gallon to avoid heating issues from recurring. I was hoping with clean cool water that she would perk up, but she isn't looking well. Is there anything I can do for her? Please help. I don't want to lose her. :-( Until yesterday, she was eating well (1-2 Omega One Betta Buffet pellets twice a day) and very active.

Housing: was probably less than 1/2 gallon, now in about a gallon (bowl is a 2.5, but I have the water level low because it has no top)
Water: Just changed yesterday (have been doing changes every day-every other day as I have been able since she was in such a small container)
Water conditioner: Jungle Start Right
Heated, no tank mates