Have you ever experienced a day that felt completely surreal and dream-like?

Yeah, I'd be concerned. My guess is that something isn't right, whether it's your brain chemistry, various hormone levels, or some other physical problem. Go visit your doctor and explain the situation. I'm sure they'll be able to help you figure out what on earth is causing this so you can be yourself again

I've experienced the unreal effect before when I was younger (Due to my dosage of some medication being too high it seemed). It's so strange. I didn't experience the other stuff you described though.

Good luck