so it's summer and i'm home from school so i usually masturbate right after i wake up. I do it on my back with my head on my pillow with my head staring at the ceiling. now this is where it gets weird, the past two mornings i've gotten the worst headache in the world right when i ejaculate. like, this shit fucking hurts, and the pain feels like it's in my temples. but it usually only lasts for about 5 minutes. so what's wrong with me, is it a neck issue, or maybe i'm just dehydrated or what? if i masturbate sitting up i don't get the pain and it happens right at the paint of orgasm, everything's fine during, it just happens right after i cum.