Not sure if my hamster has wet-tail?

I got my hamster daisy5 or 6 months ago and shes doing fine but when i went to go feed her today she smelled kinda bad. i clean her cage regularly and i cleaned it last night. her cage doesnt look like she has had a sign of diarrhea. but when i turned her over her backside looked wet. im not sure if its wet tail or not but if someone can help me that would be great. i plan on calling the vet tomorrow and see if i can take her.