I closed the lid on my snake's tail.. Advice?

 
I closed the lid on my snake's tail.. Advice?
The tip of her tail about half an inch of the tip of her tail has discoloration, it's like bruised.

I figured she'd heal up after a few sheds, but I don't know?

How fragile is her tail now? ... sorry to be kind of graphic and all, but how easy would it be to accidentally have it fall off?

Is she in pain right now and if she is, then is there anything I can do to help her? She's not one of my breeders, she is one of my keepers and a loved one of mine, I cried cause I felt so bad, I'm worried about her...

Is there any way that I can help aid her in the healing process?

She seemed to be in pain for the first minute or so after it happened, she bit me and went crazy when I opened the lid to free her tail, I've put her in the dark in her enclosure and I'm going to leave her alone for a week or two, and let her rest, but maybe I'm overreacting... pets question and answers,www.5d2d.com

How big of a deal is this?
Maybe you could call your vet?