Following my six-year hiatus from the sport, my return has been marred by post-event health complications. My first weekend out, I only drank around 6 16-oz Nalgenes spiked with Mio Sport; I was participating in games from 11:00 until about 3:30. I experienced a dull headache near the end of the day that expanded into a full headache near the base of my skull during the drive home. My second weekend out, I drank over 12 16-oz Nalgenes, about half were spiked with Mio Sport; again, I was running and gunning from 11:00 until 3:00. Nonetheless, I experienced another dull headache that grew and grew during the drive home, this time plus nausea. Now I have just finished another long day; I drank a minimum of 20 16-oz Nalgenes with and without Mio Sport but like clockwork my dull headache railed against me near the end of the day. I stopped for a quick dinner at Chipotle but I had a hard time keeping it down during the drive home. I don't recall this happening six years ago but now every outing is marred by the two headaches mixed with nausea. Any idea what's happening to me? Is it dehydration, lack of carbohydrates, or another complication?