Funny I was reading some of this (couldn't get through all of it) and I have some of the same symptoms myself. I am normally a very anxious person and have actually been to therapy a few times for this and have been even prescribed with some low dose medicine for it. I stopped taking it though as I felt I was getting better and didn't like how unbalanced I felt sometimes when taking it and then if I missed a few days or whatever. My point is I get anxiety attacks sometimes when I smoke pot. It doesn't happen very often but I do get them. Now im going to pay attention and even try and notate down what I smoke and what effects it has on me. Maybe ill try and stick more to indica from now on. Not sure I can completely stop smoking sativa as I like the cloudy head high some of them give, but ill definitely be more careful