Severe Headache and vomit. My sleep!

Hello, I am going through this problem of having headaches In every few days. It mostly happens when due to my busy work schedule i am not able to eat on time. I feel hungry but i am not able to eat due to unavoidable reasons and i can feel in my stomach that i am hungry and then slowly my half side of the head starts aching(left side mostly). Now even though i eat it wont stop the headache it will gradually increase and by the time i am going to sleep it becomes so severe that i start sweating my head becomes so heavy as if something is stuck like some kind of gas. I move my head or i bend down i can feel the pressure on the nerves in my head and i can't describe the excruciating pain. I take eno, disprin, lot of things but nothing works.. Then i take warm water until i vomit and when the undigested comes out only then i start feeling normal and go back to sound sleep.. I request all of you to please help this problem.. It ruins everything.. My important work.. My visits... My sleep