Unbearable headache

Since July 28th 2010 I been having this pain on the top left side of my head and the pain moves by my left eye. The pain is horrible. the pain last about 5 mins and sometimes it last about 15 to 20 mins. This has been happening everyday since the 28th of July. I never felt a pain like before. The pain bring tears to my eyes. I get the pain mostly in the morning. I thought it was a hungry headaches. But no matter if I eat or not. The pain comes. It gives me a warning when it about to start. Little pain comes first and then here comes the unbearable pain. It last about 5mins. I'll take a pain pill and then it take forever to go away.