This happened to me coming back from a surf trip to Mexico but from both ends. Told the stewardess to move me and a friend near restroom for necessity for us both. Then tried to use bathroom before take off she told me I couldn't. Told her I was going to throw up. Handed me barf bag. Vomited enough to overflow bag. She quickly told me go to bathroom. Spent entire flight from West Coast to East coast there lol. Good times fun trip