Welcome to the forums, cloudstrife!

I can relate to that casting about feeling you describe. Do this, nah, bored, something else, nah, not that, not sure what to do with myself. Sometimes I will think something like, "I should put some music on", when in fact I've already got some playing(!) What's up with THAT?! Also, issues with concentration. I have to take extra pains with everything (especially numbers, which I work with a LOT), so as not to make constant distracted mistakes.

I don't know if you're overthinking. I know you say you don't think you're depressed, but are you maybe a bit? I noticed that in listing why you don't think you're depressed, you listed external things, reasons why you "shouldn't" be depressed. We can sometimes experience depression when all around us appears well. We can check off all the boxes. If everything's great, why do I feel like this?

Do you normally dread contact with your coworkers? Or is that a more recent development?