I was reading through mosaic before I head to bed, and saw your post..my husband and granddaughter both got really sick last week from some type of flu bug that hit them. Nausea/vomitting/muscle aches and extreme tiredness. Thankfully, it only lasted a day, but the granddaughter bounced back quicker than he did. She was so bad, she couldn't even keep a drink of water down though!
So, it's going around. I also heard of another person in our area that was taken by ambulance because they thought it was a case of food poisoning, and it also turned out to be this nasty flu bug.