I've been there. Not that I counted wrong, they just hatched early. It is not always your counting at fault.
I don't know what your incubator or turner looks like or how hard it is to take it out. I elected to take the turner out when I was in your position. It is possible you can shrink wrap a chick by opening the incubator but that really doesn't happen that often. With mine I did not shrink wrap any that time.
The risk is that the membrane inside the eggshell will dry out enough to shrink around the chick so it can't hatch. With mine it takes a while to remove the eggs from the turner, remove the turner, top off the water in the reservoirs, clip the screen that goes in the bottom of the incubator in pace, and replace the eggs. They still did not shrink wrap when I did all that, as I said it doesn't happen that often. But another time I did shrink wrap an egg so I believe it can happen. To help minimize your risk you might put warm water in a spray bottle and lightly mist the eggs. Don't soak the eggs, you don't want to drown a chick that has pipped. Just a light mist. Some people fog up their bathroom and take the incubator in there to open it. With the humidity that high it's not likely to dry out.
I don't know what your turner looks like. The concern is that a leg, wing, of neck might get stuck in a sharp corner. The odds are if you just turn it off and leave it in there the chicks will not get stuck. There is a risk in whatever you do but I don't consider either a high risk. You'll probably be OK. But definitely turn it off.