hey there, so i have had gastro for a coulple of days now, its terrible, i have stomach cramps, dehydration, nausea, i only poo water, and basically throw up everything i eat, i think the cause was something i ate, i also had a terrible sleep last night, woke up every hour in pain, and extremely dehydrated, i dont know what to do, is there a tablet i can take to get rid of this, it feels like there is something in my stomach, blocking everything up,