You are suffering from gastroenteritis also known as stomach flu.It is an intestinal infection marked by diarrhoea, cramps, nausea, vomiting and fever.In your case food is the causative factor.Mostly Bacterial,Protozoal and viral infection causes inflammation in your stomach and intestines causing symptoms like vomiting, severe abdominal cramps, and diarrhea.You should get a stool routine and microscopy test done to see the cause of infection. Treatment Take imodium(Loperamide) 2mg one tablet stat Take a probiotic like bifilac twice daily,Probiotics contains lactobacillus. Drink plenty of fluids to avoid dehydration–You need to drink more than usual to replace the fluids lost from diarrhoea. Take coconut water it contains lots of potassium. Proton pump inhibitor like Esomeprazole(Neksium 40mg) should be taken once daily,it will provide symptomatic relief in belching and gas problem. Stop ciprofloxacin and start Cefixime and ofloxacin can be given for 3 days. Rahes on face are most likely due to allergans or toxins released inside body by bacteria.an anti allergic like certizine can be taken for i. Try to take lots of electrolyte it will relieve you in headache also. Thanks!