I have a fat lip

This morning I went to the dentist to have my teeth whitened.
The process involved the dental technician placing a very large UV lamp on my mouth for a total of 60 minutes.
After the first 15 minute segment I told her that my lip felt like it was burning. She checked and said it looked fine, "no problem."
When the cosmetic ordeal was over and all the gadgets that were holding my mouth open were removed, she handed me a mirror. I had no interest in my newly whitened, expensive teeth. My top lip was huge, making me look like I belonged on a Bravo TV show.
She assured me that the swelling would go down in a 1/2 hour. She put some vitamin E oil on my lips. I looked like a greasy desperate housewife.
I left the office at 10:30am. It's 4:30pm and my lip is bigger. I know longer look like a plastic surgery gone bad story but like little kid that his in the face with a baseball or stung on the lip by a bee. It's not pretty.
When I called the dentist to tell her that I no longer though my lip was just slightly sunburned by the UV rays but that I thought I was having an allergic reaction to something, she said "this has never happened before." Of course it hasn't.
So I took some benedryl and while it seems my deformity has deflated a bit, this has solidified the fact that I'm unable to go to dentist apppt without coming out looking slightly disfigured.