The more often you smoke the less you will bug out. I'm sorry I can't really relate to your problem because I've never really had a panic attack while blazed (thinking I'm going to die, etc.). My trick is always keep in the back of my mind that any odd happenings are the direct result of me smoking a psychoactive drug (and the weakest and safest of all common drugs, at that). You just have to go with the flow, realizing the Jamaican man is not real and see if you could actually learn something.