Hibernating?

I worked at the vitamin shop yesterday afternoon and got so sleepy toward the end of the day. I dragged myself to the yarn shop and the grocery store. When I got home, I put up the groceries and changed clothes. Then I lay down to rest and dozed off for a while. I was so groggy and fixed a Lean Cuisine because I wasn't capable of much else. After attempting to play Scrabble while eating, it was all I could do to go back to bed and watch the State of the Union Address. I saw parts of it and then went to sleep big time, not waking up until 2:30 AM when I got up and turned everything off and went back to bed until around 8:30 this morning. Good grief! Am I sick? I still don't have any energy and don't feel that great.