I do nos when I'm out or at a rave and I'll do three or four balloons in the night. I do not do it a lot though. This weekend I went to a festival and did 16 balloons one after the other. It was mad, was tripping like crazy. It's the evening after and I have an incredibly sore throat, feel a bit head achey and strange. Although, these could be due to all the MD I got through this weekend. But I was not onit when I did the Nos. I've heard a lot about people having their lungs frozen. Am I going to be OK? Is there anything I can do? Should I see a doctor? Any help would be much appreciated as I'm not incredibly knowledgable about Nos 

