That's really interesting. Yeah alot of times you will get those weird sensations, and they can be really confusing...like you said at points you felt really heavy and at other times light as a feather. I am guessing that the wind you heard blowing was hypnogogic sounds...it's all apart of hypnogogia. Alot of people hear strange things while they are WILDing or in different stages of getting into a dream.