Since I've had GAD I notice I get times where I feel kind of tired and hungover even though I haven't drunk anything the night before. I'll like walk into the kitchen and I'll just feel in a mild daze, I guess like you get when you're really tired. It's not depersonalisation because I don't feel weird or like things aren't real-- just lethargic and kind of foggy. It usually passes with distraction or a good night's sleep! Anyone know What this is? I'm not nearly as anxious as I used to be but I still get days like this. Maybe everyone does and I'm just noticing them more after anxiety? I also used to get a very similar feeling right before my period and I had like a heavy/headache feeling.