I had a stroke a few years ago that caused this for a time. It was weird to hear myself talking in a normal voice and seeing everyone look at me because all my words were coming out slurred or in the wrong order.

I also, for a few weeks, had synesthesia which is where you hear in color. This is hard to explain, but when someone would say something cross to me I would see everything in a red hue, nice sounds caused everything to go blue... It was like putting on shaded glasses for each different sound.

And then it all went away. Slowly but surely everything returned almost to normal.

My Doctors told me I had a stroke because I was old, I told them having a stoke will make you feel your age.