I can relate to you my friend. Not about the coughing up a lung, hearing things and shit paranoia but I have just quit smoking weed too. My parents caught me and even tho it wasn't that bad I don't want to ski anymore. Drinking should waste my time when i'm not skiing. Ever since I quit smoking weed I feel like I have better concentrated on skiing and I have improved over the past week more then I improved in a year last winter. It is truely amazing.
To the people who do smoke, watch out. Even though you think you will never get caught and you think it is not possible, it is, trust me. I never thought I was going to get caught at all but I did. So go out smoke and have a fun time but it will catch up to you I garentee it. And though some peoples parents don't care, for those of you who parents would flip, it is the worst. You can smoke I just wish you the best of luck not getting caught.
At this point I can say I will not smoke weed again. It is a good time but I feel it is pointless to any other aspect of life. When I smoked I did have the best times of my life but it is time to put that behind me and start to get serious about life. I miss it but I cant do it again. No matter how many blunts my friends smoke or how many parties I go to I can't smoke weed again. It's just a promise I have made to myself and intend to keep. I have never felt better in my life and I feel it is a new beggining. So cheers to you and me dude and let's go out and kill it on the mountain!!