I'm extremely new to hookah and a friend and I smoked yesterday. We used a quick lite coal, and neglected to wait until it was fully lit to begin smoking. We used three coals and smoked for about an hour and a half. Later in the day, I developed a headache and was a bit out of it. Today I feel weird and still out of it (possibly due to not being able to sleep the night before), and am wondering if I may have CO poisoning. Could it just be a nicotine buzz, or a hookah headache?