Very bad high, but what was it?

Last year november I went on a weekend with some friends and brought a bit of weed to have a good smoke. I've smoked before, so I wasn't really planning that I'd have a bad trip but I really, REALLY did. I have a feeling the weed was laced with something else, but I have no clue what and only started thinking about what it mightve been just now. My head got cold and tingly at first, and when it got more serious my mouth went completely dry- I wasn't able to swallow any saliva as all of it had just gone. I started hallucinating, getting incredibly paranoid (doors dissapearing, not being able to really tell wtf was happening) and when I went to bed I was left spinning and seeing colored patterns for HOURS next to cold shakes before I eventually passed out.

I know about greening out, but can it be this severe? It kept me away from using for over 6 months out if pure anxiety that it would happen again so.. any input would be nice :)!