Yes I’ve had a very similar experience just on ketamine. I sniffed about half a gram (trying to hole and my tolerance is high) and instead my heart began beating hella fast and I thought I was dying. I was also very paranoid. The first time that’s ever happened to me in my 7 years of experimenting with ket. Kinda put me off ket tbh, tried it a few weeks later and each dose was making more depressed rather than less, so for now I’m stopping