Dude, thats just bomb-ass weed and your lack of tolerance speaking. My first joint was a super strong G13 cross and it made me feel like I was in a centrafuge. I just laid there and it felt like the room was spinning and my body could almost feel the g force. Every so often Ill get some good shit that will almost get me there, but it takes so much more than a joint of even the dankest shit I can get to put me there. Enjoy your low tolerance while you still have it. As for the coughing, it ain't no biggy, just get a good bong full of ice and take it easy till your lungs toughen up a bit. My girfriend smokes almost as much as I do but she cant hit a glass pipe w/o coughing up a lung. Keep Tokin'!