After sex headache?

Gina • Aries ♈️

So it doesn’t happen every time I have sex but it only ever happens in doggy but as soon as my partner and I get done having sex and I stand up I get this god awful headache that is the worst headache I’ve ever had and it’s such a sharp pain. I instantly need to lay down. I’ve looked it up before and just says some people get headaches after sex and when they orgasm but I’m not orgasming when I get them. Just wondering if anyone on here knows what I’m talking about or has had the same thing happen to them??? It’s so weird. I’ve never experienced it up until almost a year ago