Your symptoms of vomiting, frequent loose stools, and rashes after travel are likely due to a stomach infection or food poisoning, possibly with an allergic reaction. Stay well hydrated with ORS, water, and coconut water, eat light foods like rice and banana, and avoid oily or outside food. For rashes, keep the skin clean and avoid scratching; an antihistamine may help if advised by a doctor. Since you have 7-8 loose stools and vomiting, it is important to consult a doctor promptly for proper treatment. Seek urgent care if you develop severe weakness, dehydration, high fever, or blood in your stools.