repeatedly vomiting after very small amounts?

hi guys i usually drink 3x 8% ciders on an evening without any problem and don’t really show any signs of intolerance. However today, after 1/2 of the first one i felt the urge to vomit immediately, i thought id be fine since it was straight out my system. all evening i have been projectile vomiting all fluids or food i try to eat. I’m going to try my best to sleep it off but if anyone has any idea what has happened or had similar experiences?