Have we ever done this?
Not since the start of 1989/90 at least, where I've got all of the goal times and I can't remember us doing it since I've been following Notts.

We last drew from being 3 behind at home to Cambridge on Saturday 23rd December 2017
Last time we came from 2-0 down to win was against Bristol Rovers in the FA Cup the month before (Friday 3rd November 2017).,

I don't know if we've ever lost from being 3 goals up either, but we did draw 3-3 after being 3-0 up at Bolton in 1988/89.