Hangover feeling but without drinking

[MoonSearch]

I was in bed at 11.30 last night. I slept well all night. Up early for 7.30.

All day today in work my head is so sore. It feels like a hungover head. It feels like a foggy head. It feels like a tired head.

I'm dying. I'm still not done with work and all I want to do is go home to bed.

Does anyone else feel the same. I take magnesium and my diet is good with fluids/water every day.

I sometimes feel like this.

could you be due on your period? Or maybe you just slept heavy and you feel groggy.

did you also drink enough water yesterday/today?

I feel like this if I sleep with the window closed.