I don't have evening depression but I have evening irritation. I'm diagnosed BP2 at the moment but I have a lot of mixed moods pretty regularly. It's pretty exhausting.

I've heard that light therapy can help with depression. Is this just starting up? I've been noticing it is getting darker earlier with fall coming. Maybe you need more sunlight? (Unless this happens in the summer, too.) I know that the seasonal shifts are always harder for me. That might be part of it, too.