So this seems to happen when I take a break and go back to it or when I take a particularly large amount of H. I have only ever smoked it. So anyways, one of two things will happen. 1. As soon as I fall asleep or shortly after I do so I get thrown into intense vertigo and just straight up delirium which causes me to jolt out of bed, freaking the fuck out while I try not to fall over and I wait for the spinning to stop. 2. This one is happening tonight which is why I'm not sleeping and writing this instead. I've woken up 3 times tonight with the sensation of drowning. I do have to cough as I write this to clear my airways almost like when a drink goes down the wrong pipe, or you choke on your spit.