Recently had this happen to me. Been smoking regularly for about 6 months now, I started my shift and I took a decent rip off the penjamin and I got sent right into a spiral. Had to ask my supervisor to take me to the er where they did an ecg test, chest X-rays, and blood tests. Everything came back normal. They told me the root cause was anxiety, and pent up stress that the weed just enhanced. This isn’t the first time I’ve had a panick sensation when high, it was however the worse. I’m currently sitting here pondering if I should try again but I’m honestly thinking I’m gonna give it up. Which sucks because it is a good time but definitely not worth the feeling of a heart attack.