Strange Headaches - Your Opinion

I get this odd headaches that come & go as they please, medications like ibuprofen & tylenol have NO effect on.

They'll start in the evenings, go all night, into the morning, then, between 9 & 10 am, after a normal morning routine of showering, breakfast, coffee, and all, it goes away. poof. Pretty much with no warning.

Any ideas? Pretty much ruins a good night's sleep, and it's frustrating when I take meds expecting them to work, and nothing happens.

Just looking for ideas.... I realize nobody here's a doctor. I don't take any medications, sleep normally, eat normally (though probably not as much as I'm supposed to), and don't smoke. I'm not drinking alcohol on a regular basis, which also doesn't seem to help or worsen the headaches...