Standard cooler. And nothing you can do. This stuff happens. I play a lot of PLO and I have started to be very cautious with middle or bottom sets.
In NLH however, other than that imagine you had KK and villain AA and the flop comes AKJ.....you call the all-in and if you get beat, well, next time you'll win.
In any case I would have been more afraid of straight/flush draws. But when villain shoves you pretty much have to call. I agree with previous posters, if you start folding here, you will be bluffed out of every single board with draws in the future.