I really hope that you are feeling better and sleeping right now. I think you were probably feeling off all day and couldn't eat your lunch b/c you have your period. When I have my period, like now, sometimes my appetite is really bad. I think what made you feel sick was the milk shake. Are you lactose intolerant? I few years ago, my husband went to get Dunkin Donuts for us. I got an egg sandwich and decided to drink a huge thing ofchocolate milk afterwards. I had a taste for it. Big mistake. I started feeling very sickly within the hour. More like an upset/sour stomach. The feeling was so yucky that it worked me into a huge panic attack where in turn I started to feel n* and dizzy. It sounds like it might have been the mix of the milk shake and a panic attack. I hope you are feeling better.