Ewwwww, I once brought orange juice straight back up, and hence I cannot even think about drinking orange juice even to this day, it makes me sick!
The best thing I have found for a hangover is Gastrolite, the berry one (it the purple packet), as it fixes the dehydration problem. I always have some of that, plus some fizzy B & C vitamins, and it helps soooo much!!
Hope you feel better soon Shelly