What to do?

I've had a headache for 4 days and counting to the point of being nauseous. I thought it was the wine from Friday night and now I just think I've had the flu... or something. I go through the motions with my kids, but I really just want to lie down... I am functionally sick. Except that I did not go to spin class, I havent' exercised in days and it's really making matters a lot worse mood wise. Today I will drink water and hope it goes away. I need to get back to my old self!