I know that anything more than 5v touches any GPIO then it's dead but I was changing the wiring and accidentally plugged a 12v 2A (for motor supply) connector to a female connector which leads to GPIO pins 20 and 21 for a very short amount of time, maybe a second; ofcourse the PI tripped and got reset immediately.
Now, I didn't let it power on for a minute and powered it on again. It crashed several times till the splashscreen showing it's logo and then booted to the desktop finally after few crashes.
I immediately noticed the cpu load percentage on top right being constantly above 25%(unusual) and the power(lightning) logo in the top right stayed there constantly as well so I touched the pi and it was too hot to touch so I immediately switched it off and haven't turned it on since.
I looked up the internet and there's mention of a fuse which resets over time but observing the behaviour, my question is, if it boot up to desktop, is it fine and will it reset?