I apologize in advance if ive said something stupid or repetitive as ive not read the whole thread but my suggestion is to just take it slow, maybe only pack a few hits and see how you feel. You can always go from there, its not like acid or something where after a little another dose will not really do anything due to quickly building (and fading) tolerance. Pack it up, hit it a bit and see if you enjoy where your at, if not smoke some more and get skeeeedd
A friend of mine has smoked weed like 3-4 times and everytime its some nice buds and he'll smoke too much and have an awful panic attack. This has pretty much shyed him away from all psychoactives. He doesn't like alcohol either... but he'll chain smoke cigs all day long..