What could it mean if i feel sick & tired after everytime i eat?

I dont think its any of the above. i feel that you eat a lot of fatty food or eat more food than your body needs. This causes the blood in your body to kinda flow towards your stomach to help a difficult digestion, that in return takes the blood quota from the brains away, and you feel drowsy.

SO eat in smaller amounts at a time and eat lighter food....

You need to try and eat at regular intervals through out the day. Sounds like your sugar levels are yo-yoing. Try to stay away from fast sugars. If you do eat regularly meaning several times a day every day, then you might want to go to the doctor and find out if you are hypoglycemic or have early stage diabetes.

You could be diabetic or you could have something else. You don't give enough symptoms. But when you eat your sugar goes up then you will feel sick, your stomach will hurt, and you will want to go lie down. If you have any other symptoms then it could be something else.

My father had the same problem before he was diagnosed with diabetes. That is one sign. Check your blood sugar.

that used to happen with me. i wasnt gettng enough protein from the foods i was eating