I would probably try benadryl as it sounds like she is having a histamine reaction; this may help a lot w/ the irritation. You'd give 1-2mg per pound of body weight, every 4-6 hours. We normally don't give out dosages here, but the Benadryl dose is one that is elsewhere on the forum...and, Benadryl can be a lifesaver, literally in the case of stings or whatnot, so it's important to know the dosage for your kiddo.
Make sure you run it by your vet first to make sure they approve trying it.
