Is she showing any signs of respiratory distress at all?
By the way, don't get her too warm... the blow dryer should be barely warm especially if there's a heat lamp involved.
Because it was a stressful moment, you might want to keep her up (with a buddy perhaps) where you can keep an eye on her for a day. It's a good thing she didn't drown, honestly - I'm very glad you caught her.
You might go by the feedstore tomorrow and stock on a couple of staples just in case. That would include a broad spectrum antibiotic, and also Probios or another live bacteria probiotic (unless you choose to buy acidophilus tablets/capsules from the grocer/pharmacy - because likely you won't be able to use yogurt with m ost feedstore antibiotics). On the antibiotic, do not give it until you see respiratory symptoms. That can include upper respiratory (open mouth breathing) OR lower respiratory (tail bobbing). Watch both ends.
Incidentally, chickens do have lungs - just they don't depend solely or even mostly on them like people. They have a combination of lungs AND airsacs upon which they depend for breathing and gas exchange. It is possible for birds to get infections in their lungs and lower respiratory system. Treatment for them, by the layman, requires systemic antibiotics as nebulization (misting) treatment isn't possible by layment for LRS infections.
In the mean time, feed her up well. If you have beta carotene vitamins at home, they would be helpful as they provide vitamin A (great for respiratory problems) with a large margin of safety against overdosing.
Let us know if anything changes.