Mouse Button 1 and Mouse Button 3 switched.

So i've been trying to manually switch attack move click to left mouse click, but for some reason that hasn't been working at all. I don't remember how but I somehow switched the left mouse button with the mouse wheel so to click the map, ping, turrets, champions, etc. I have to press mouse button down. I don't know how to fix it and it's bothering me especially since attack move click isn't working. I even uninstalled league and installed it again but that didn't work. I want to either set attack move click to left mouse button or reverse the mouse wheel and left click actions.