I don't know about the yawning or sneezing. If she's not having any of the other symptoms associated with RI or mouth rot, I would just keep an eye on her and not stress unless any other symptoms start.
The spot on her head looks like a healing rub spot. My normal bp has a similar patch on his head but it improves with each shed. If it gets worse, or changes significantly in size or texture, I would take her to a vet to have I checked out.
The wobble doesn't sound too unusual, my lesser bee will do similar things. So long as she's eating and such, I wouldn't be worried. Lemon will loop like a rollercoaster when I hold him ad wobbles when he's stressed, but eats like champ (now that he's not fasting, anyways...)
Fuzzy mice are too small though, most hatchlings start on hopper mice so I would definitely up her prey size if you want to see some growth and weight increase!