Sunday evening I started feeling very achy all over, got a headache as well. I took a couple extra strength tylenol and went to bed. In bed I was achy and got hot and sweaty. Yesterday I broke out in a sweat just walking into work, which never has happened before. By the end of the day I felt achy and sore all over again. I went home and just layed around all evening. I had a great sleep last night and woke up feeling much better, but still have a headache. Also, I m sweaty again like crazy. Any idea?