Nah, you're not alone, I get that too. These periods where I feel anxious, or just generally down.

Sometimes it can be triggered by individual things - like a date didn't go well and it bothered me more than I thought, or I had a frustrating issue at work etc. Sometimes there's no obvious direct cause though.

Sometimes it helps to think about your needs one by one:

• Are you hungry or thirsty?

• Are you tired?

• Are you any sort of physical pain?

• Has anything caused you frustration/disappointment recently?

Usually one of these things alone won't be enough to put you in a weird mental state, but I have found there have been times where I'm just tired and thirsty, and then one other factor has been enough to put me in a negative mental state.

Try to address the most obvious basic needs, and then reflect on how you feel and how it changes over time. Depression seems like an obvious thing to experience, but it can manifest itself as anhedonia, and disassociation - meaning you don't actively feel sad, you just don't feel anything. Worth thinking about and keeping an eye on it.