Hi , Welcome To HCM & Thanks For Asking Your Query Here According to Your description your symptoms are most probably related to food poisoning which might have been caused by some wrong food which you have eaten Mild case Food poisoning often improves without treatment within 48 hours and as you have mentioned your symptoms has been also improved over 24 hours (Vomiting are stopped , headache also become dull ) you should let your stomach settle ,Try sucking on ice chips or taking small sips of water, make sure You re getting enough fluid when you re urinating normally and your urine is clear and not dark Gradually begin to eat easy-to-digest foods, such as soda crackers, toast, gelatin, bananas and rice. Stop eating if your nausea returns. Avoid certain foods and substances until you re feeling better. These include dairy products, caffeine, alcohol, nicotine, and fatty foods , Along with these Do proper Rest. You can also take over the counter medicines like paracetamol and ibuprofen to ease headache and body pain If Your symptoms do not subside within 24-48 Hours then please contract your doctor to get it evaluated , you may need antibiotics and IV Fluids in severe case I hope it help Thanks & Get well Soon