:jointsmileynesty Omen,

I'd say get your Potassium back to normal and wait. Since, you are having a problem with your Potassium level. You need to correct that first. And start eating, at least a banana a day (at your age), try potassium rich foods..oranges, avocado, potato off the top of my head, there are plenty. Get on a good well balanced diet.

You sound like you are having issues with hyperventilation, to me.
Try breathing in a brown bag.
Generally, the signs you are reporting, are more of a result of Hyperventilation.
Not much else, can't believe the ER, did not pick up, on that. Unless, you only reported your rapid pulse. The increase in your pulse, can be associated with the pot. However, it doesn't really sound like that is the problem. Your pulse will go down. There are threads here on how to address it. And if it was up, in the ER, they would not have let you out with it elevated.

I'd deal with one issue at a time. Get your emotions balanced, with your diet.

THEN I would try a non-sativa. And I can tell you, most people really don't have a clue if their bud has sativa in it or not. So, all the more reason to find some Indica and learn to grow. The growing will help you with your anxieties. However, they seem, relatively mild.

I must tell you though. To be perfectly honest.. I also felt you had a hang-over(using that word lightly) and might be dehydrated. And thats all I got for ya! Hope someone else chimes in! :rasta: pr