Upper lip swelling after veneers normal?

I had my perm veneers done on Wednesday, swelling of the upper lip started Thursday night, and it's now Sunday. I've been to dentist and ER and they can't give an explaination. I'm at the point of thinking I've made a horrible life long mistake. They don't think it's allergies as it goes down (not all the way) when my head is elevated and goes up when I lay down. Please tell me it's not permanent. I'm really scared.

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