Yes, I have these days too and I agree that they are frustrating because I don't always know "why" or "what triggered" the day to be a bad one.

I was extremely depressed and tired yesterday and today. I figured out that what triggered it was seeing an article about Weiner, and it reminded me of a lot of pain I went through with my husband. But I was actually having "emotional/depressive" flashbacks. However, I also have other things going on in my family that have been tiring me out and bringing forward some anxiety, or physical pain that I have to really think through, it's so much work some days tbh. I hear you.

OE