Sick?

On June 23 at night I started feel extremely nauseous it was horrible I don’t like throwing up so I was holding in my throw up until the next day 2am and in which I threw up and even when there was nothing left I kept trying throw up I am better now but my stomach is like feeling weird and if I drink too much water I feel like I might throw up I am pretty sure its cause of something I ate or something like that but is there anything like tea or a medicine that will soothe my stomach so I could eat?