Hamster breathing problems.

[Hammygal]

Last night Sofie was in the corner on top of her bedding. She was breathing very hard, and very lethargic and still. I picked her up and she kept her eyes closed. When I checked 2 hrs later she had crossed cage and was buried in bedding, except for head. When I went to bed she had gotten in her hideout.
This morning she came out and drank water, went into her tubes and layed down.
I called vet and they were booked, but said they would work her in if I left her for the day. I cant wait to see what they think.

UPDATE: Sofie is fine, didn't find any thing.Dr said she was breathing fine during exam,she ate and drank while there.