Hi thanks for asking question ... Here according to history you could have gastritis or acid reflux disease.... Follow below advise..... Drink lots of fluid... Fruit juice more ... Small meal taken with frequent interval for few days.... High fatty meal avoided... Head elevation while sleeping by putting pillow below head ... Don t immediately go to bad after taking meal ....especially up to 2 hour of post meal intake.... Cocholate, pastries restricted. Avoid smoking.... Omeprazole taken on empty stomach before meal.... Excess spicy food avoided.... For vomiting by acid irritation of esophagus metoclopramide or domperidone tablet can be taken... Hope your concern solved. If no benefit consult physician for further work up according to examination. Take care