Oh, that sounds painful! Is it just the face, or is your eye actually swollen? Is is interfering with your vision?
You may want to talk to a doctor, if the rash hasn't started to subside yet.
A lot of the skin creams and medicines and whatnot shouldn't be used too much on the face. But taking some allergy pills might help, and shouldn't do any harm.
That. and don't touch or scratch it!