Almost anyone will have a panic attack given enough THC in their bloodstream. Chances are MJ is telling you to lay off her. If you get panicy at a single hit you should just quit. Don't force what feels wrong. I love LSD but if my sister takes a hit ever again she will likely never be allowed to leave the psyche ward. Everyone is different, listen to your body.

Also, always know....it will pass. Give it time, real time, not perceived time.