What Causes Frequent Hunger, Dizziness And Nausea?

i get hungry damn quick, then i start feeling dizzy and my stomach feels as if its churning and i feel nausea out of hunger and it happens within minutes and so i need to eat something real quick to relieve me of symptoms and it mostly happens around 10 or 11am although i do take a good breakfast. and i feel hungry rest of the day too despite taking standard 3 meals with 2 snacks but i can help it in evening but not in mornings at all! i m aged 22yrs, wt 49, height 5'2" and i do job.