lately I keep having a vision type experience, where I pass out and then I'm standing somewhere make of clouds and mist, sometimes I see things and hear things there, then I wake up. is there any explanation for this?
Do you actually pass out or is this part of your vision? If you are actually passing out I'd seek medical attention.
Otherwise this could honestly mean a wide range of things. It gives me the impression of an Olympus type setting, the home of the Greek Gods.
The sense I get of it is that you're looking to new horizons, ready to expand your awareness and understanding of life in general. Perhaps you're about to start a journey, mental, emotional, or tangible? Maybe you're just moving on in some sort of study?