MacBook Pro types multiple letters at once

So out of nowhere my keyboard seems to be malfunctioning (No liquid spills, overheating, and it hasn't been dropped). When I type certain letters, I'll get a combination of surrounding letters too. For instance, if I type the letter A, I'll get as instead, the letter January gives me jkl, etc. To even log in I had to use an external keyboard because upon restarting it just types \\\\\\\\\ continuously. If I press the caps lock key, it cannot be turned off again.

It's a MacBook Pro Retina 13-inch early 2015, and I got it about two months ago. I do have apple care, but if it can be fixed by changing a setting or something I'd rather save the hassle and do it myself.