I am unable to accept by my 14year Old Cousin sisters sudden death. There parents didn't opt for post mortem. She complained about headache abt an hour before death...with double vision and increasing severity just before death....shrieked loudly and vomitted (no blood)...then became unconcious, very low pulse / negligible pulse and eventually died within ten minutes of the vomitting episode on her way to hospital...what could gone wrong so suddenly that she didn't give us any time at all? She was perfectly healthy and active other-wise.