Shambles - Your AMT is probably the freebase, not the HCL. The freebase is an off-white, solid-colored powder that smells like rancid ass. Whenever I transformed it into the HCL, the crystals appeared half-clear. I have rarely heard of AMT available as anything but the freebase, although of course it's possible, and I did hear about an HCL batch a while ago (last year maybe).
Try dissolving a bit in water... if it dissolves, it's HCL or some other salt, and if not, it's freebase.
So last night I decided to hit my bong and head to bed... I was on quite a bit of DOI but wasn't really tripping very hard. Until I hit that bong. oh god, I was actually pretty scared for a while which hasn't happened in a long time. I had vasocnstriction pretty bad (before the bong I did not) and as I laid in bed, I started traveling to some other strange and uncomfortable world. My heart was racing even after deep breathing and laying down for a half hour, and I started to get some light chest pains and this weird neck pain that made me feel like I was in danger. But it only happened as I started thinking about it, and it seemed sort of psychosomatic.
So after a while I got up and took some L-arginine and drank a big guzzle of vodka... trying to calm down a bit and dilate my blood vessels. It totally worked, too... I started feeling MUCH better and the (phantom?) pains went away and I got some sleep after a while.
And now I'm feeling pretty great... DOI is still going. I haven't been smoking much weed for the past few months and if I do it's like 1-2 one-hitters. When I trip I usually don't smoke much anymore nowadays either. So I forgot how incredibly powerful it can be to slam a bong on a powerful psychedelic. First time I've been floored/scared in a long time though from drugs.