A week ago my friend and I inhaled 3 or 4 whip-its each after a concert. I have done this a few times in my life before and enjoyed it. This time though I woke up the next morning very lightheaded and with a headache - this was very obviously from the nitrous. The headaches haven't gone away. It's been about a week straight of a constant headache. The headache isn't that bad and doesnt hurt that much, but its just always there, along with a slight lightheaded feeling. It's just stranged cause I've hardly ever had a headache in my life prior to this. I'm prolly just being paranoid, but I hope I didn't cause brain damage or mess my head up permanently. I dont know that much about nitrous or potential affects, but what is the deal with these headaches? Is it something serious or will it likely go away soon? Has anyone had this experience?