I woke up today at 4 in the morning to an unsettling stomach. I went to the bathroom, and threw up for a few minutes. I went back to my room and couldn't fall back asleep. I would go from feeling okay, to feeling sick again. I tried drinking water and it made me feel worse, and I tried eating grapes and about 10 minutes later I was throwing them up. I didn't feel sick at all the night before. I'm not sure what the cause is or what's wrong.