Why am i so hungry all of a sudden i.e just today?

It's just low blood sugar. Protein and fat will fix you up fast. Get some fiber into you and believe it or not do some table spoons of nice salad oil until it stops. Lay off those damn carbs. for a bit. Read up a tad on protein diets. The way you are munching you're running a real risk of getting chubby and diabetic. People are protein hunters. Screw all that we're supposed to be "NIce Bucolic" types living on tofu. If you look around the world the leanest healthiest people are protein eaters. Nothing like a nice beef brisket to put forth my best in bed with my old girlfriend. You can get great protein snacks every bit as tasty as Doritos if you shop around a bit. Your friends will hate you for getting so skinny.