HAHA first youre horny now you have a headache. how cliché!
Anyway I think you have the exact same problem as me.
I used to get headaches every other day. I didnt know what caused them because I didnt sleep right, eat right, drink right, my parents were always drunk and yelling, tv was always on loud, it could have been anything. I took advil and sometimes it works sometimes to no avail.
Then I moved away from my parents and my headaches went down to about two a month. Amazing difference. I started realizing a pattern. My headache are always in my left temple throbbing away. I changed my eating, sleeping, exercising and sleeping habits to much better ones and I still would get them.
I started studying and studying and found out ( oh brain tumors are very very rare btw) that my headaches are caused by the way I perceive stress. Meaning when theres a stressful situation , its how I take it in, what I think of it. Example my parents are drunk and yelling at each other, me: "god this is happening again, i can never do my homework, I need to break it up before it starts getting bloody again, why cant I live in a normal house where this doesnt happen.." then i start thinking about how some other families dont have to deal with what I deal with and it would make me sad or whatever. Anyway I was conditioned into everytime I SAW alcohol I became sad. Ive also been conditioned into thinking that everytime i take advil, its helping (if i was given a fake advil then it would have the same effect on me 'placebo effect')
anyway point is, when I get overemotional and overreact about bills not being paid or something that can be easily solved I stress out and get a fu(king headache. When I take things slow and Im like "okay they say i didnt pay it but im sure I did, im going to check my records and give them a call and it will all be fixed.." then i dont get headaches! When i moved out of my parents house the stress was massively reduced and I got less headaches though I didnt know why but after I took a psychology class I became way more self aware and can manipulate my thoughts to stop myself from stressing out and overreacting.
Sometimes i still get them for seemingly no reason but not nearly as often.