I am guessing, but the headache is behind your eyes, right? If I am right, that is a nasal headache. People's noses fill up with mucus when they cry. And, just like when you have cold or allergy reaction, if it fills up your nasal passages, you will get a headache.
Headches are behind your eyes you cry for long sometimes your jaw feels heavy or you get migration but it's just something that happens to everyone sometimes is different to me it's my jaw feelings heavy