Hi For The Past 3 Days I Have Been Feeling

Hi for the past 3 days I have been feeling unwell. It started one night when I felt dizzy and as if I was going to pass out but nothing happened and I went to sleep the next two days after that I felt an uncomfortable feeling in my stomach and didn't feel like eating. When I would try eat it would make me feel like vomiting also even after I've eaten my stomach still rumbles and feels like I am hungry. I have not vomited, diarrhoea or fainted. I thought it was a stomach flu but I'm not sure? Please help.