I would recommend that you have ORS solution for the next 3 days, increase your water intake to upto 3-4 liters per day. Don't skip meals as it will only worsen your condition, since you have difficulty eating food I would advise you to breakdown your quantity of food and increase the frequency of eating for example break down a 3 square meal down to 5-6 square meals with reduced amount and increase the amount and reduce the frequency as you can tolerate. I would advise you to have a liquid diet for the day and slowly starting solid food as you can tolerate. Avoid spicy,greasy,deep fried and junk food.