Good for you for recognizing that you need a day for yourself! I work at a day spa and I talk with a lot of women who don't take a day for themselves because they feel like they don't need it or will regret it later. There's a reason why your body is telling you it doesn't want to go to work. It's TIRED
Bath's are always the best way for me to relax, and help with the headaches/migraines.
Feel Better Soon!!!