Getting stabbed is always going to be a possible outcome when buying drugs. Similar to sleeping with a hooker without a condom and getting an STI.
I've never valued a chemical over my life, so have stayed away from hard drugs. I assume it's hard drugs, as weed is so easy to get from random stoners in college that wouldn't stab a fly.
If you wanna do drugs, cool, no judgement from me. But I also don't sympathise when the outcome is rough.
Crazy story though, I bet the adrenaline high was better than whatever shit you were buying too