I keep doing zoning out and doing stupid things...?

It sounds like you're under a lot of stress. When you're overloaded by anxiety, you slow down and stop processing things fast enough. There's just not enough energy left over after all of the stress to focus on what's going on. That's my best guess, at least. You should get checked out, because even though something like this might seem simple, it could be anything from anxiety to a thyroid disorder to diabetes to something else.