How can i deal with intense first day menstrual pain?

as i kid, on the first day of my period i wouldn't be able to consume anything not even water because it would come right back up, vomit continuously, have the runs, hot & cold flashes, and if i switched sides when lying down i could feel my insides swishing and sliding down to the new side causing me to vomit. all of this only on the first day, rest of the week would be pain free. had a baby, relatively pain free periods for 3 years, now i feel the 1 day pain episodes coming back. what are some ways i can deal with that without missing a day of work every month and having a child around to take care of?