Very normal. That's 13 shots +. Alcohol detox is rough and can be dangerous. Do you have anyone with you?
Ya know, I have medically detoxed more times than I care to (or can) recall. There is no shame in that. Call you dr or go to ER. They can help and really make it much less painful and dangerous.
And then, you never have to feel this way again. Read here. There is tons of advice about how to take back your life! Good luck.