For your headache and body pain, paracetamol is the safest choice because it is gentle on the stomach. Avoid ibuprofen or aspirin, as they can irritate your stomach and worsen vomiting. To help control the vomiting, an antiemetic like metoclopramide can be effective, but it is best to consult a healthcare professional for a proper prescription. Most importantly, focus on hydration by taking small, frequent sips of water or oral rehydration salts (ORS). If you cannot keep fluids down or if symptoms worsen, please seek medical advice to ensure you get the right care.