When I have a really bad headache that just won't go away it usually means I'm dehydrated and also low on electrolytes (salt, potassium). I get busy and don't notice sometimes until I'm so bad I have to sit and drink something so I don't fall out.
But before it gets that bad, say I've slept late on a weekend and have one of those headaches you get from oversleeping that'll quit in an hour or so, if I have an orgasm and it's really one of the bad ones , the pain will suddenly get pretty bad. Bad enough to where I can't walk around.
Not sure what cumming has to do with it but it seems to be the catalyst t for making it much worse. When I have a "normal" headache the only thing that works is 4 aspirin. Tylenol or naproxen (Aleve) doesn't work at all, nor does hydrocodone.
When I get one of the bad ones the only thing that works is water, salt and potassium and a dark, quiet place to lay down. And hopefully the wife isan't horny, LOL