I'm not sure where to post this, so I'll give it a shot here. Also, I'm not sure if this is mental as much as it is physical.

Last October, I drove about three hours to meet up with some friends at a party. We started drinking as soon as I arrived, and at the end of the night one of my friends passed me his joint and I took a hit, and immediately everything turned black, I felt lightheaded to say the least and I could barely stand and I had to find the couch. I lay there for about 2-3 minutes or so and was up and about after that. But this had never happened to me before and I figured it was the combination of drinking and the weed because I had never done both.

This past January I drove to the same friends house, and we didn't drink this time. He was taking hits from a bong with his other friend and I decided to try. As soon as I took a hit, everything went black( exactly like the time before) only this time I actually fainted, and they were about to call an ambulance. I finally regained consciousness, and I haven't smoked weed since. I really don't know what to attribute this to? Has anyone ever heard of someone passing out from a hit of marijuana? Also, should I be worried about a lack of oxygen to the brain, or is it like any other case of fainting? I may be paranoid(which is likely), but I have noticed that my short term memory has been pretty bad lately(I am not a regular pot user) , and the other day I mixed some words together when yelling at a co- worker which is something I've never done before; I said " you're voice sounds like chalk on a nail board." I'm probably being a complete hypochondriac, because I doubt brain damage occurs whenever one faints? I have also been fighting a bout of depression for the past couple of months, so this may be a factor.

Thanks guys for any input.