Huntsman writing by itself than deleting (making typing impossible)

Hi. Earlier today I activated "gaming mode" by mistake (AltGr + F9 is another shortcut of mine but I did Fn + F9). I then panicked cause I didn't know what happened. I might have pressed a few random keys because I was in a game and didn't understand right away. The keys which I press wouldn't work, so I tried again typing something like "asdfasdf". I then exited "gaming mode" and suddenly nothing would work. The keyboard types a specific string, something along the lines of "ndndndasdasd". Then, after a few seconds, it's like the backspace key is pressed a few times or held down, and it deletes everything + a few letters before the weird string. I also CANNOT type neither "d" or "n". Pressing d does nothing, and pressing n automatically makes the keyboard type the weird string of letters. I cannot find any info on that issue anywhere. I have tried disconnecting the keyboard, rebooting the PC, uninstalling/reinstalling Razer Central. Nothing works and I can't use my computer keyboard for now... I hope someone knows how to fix that. Thank you.