Sounds a bit like you may have suffered from anxiety.. this will cause people to have fevers, nausea, usually related to stress, from the worry of the hike. Water alone will cause an in balance in electrolytes Hyponatremia .. This causes headaches, body aches etc... I see Steve mentioned Diamox, I am not a believer in the pills as they in them selfs will cause dehydration without proper water and electrolytes together.. Also other side affects like really bad dreams... NOW please this is a personal opinion.. Its unfortunate that you didn't summit this time ..My recommendation, go again next week and I would be willing to bet you will walk right up to the summit and have the biggest smile ever..
