can morning sickness last an hour?

I had realllllly bad nausea for only an hour. I tried to ignore it and went to panara with a coworker. Just LOOKING at her sandwich made me want to vomit. I had a VERY hard time eating my food. no one knows im preg yet so she probably thought i was being a weirdo. Is it normal to have Morning sickness for an hour? ALSO, do you tend to feel better after eating something?