I was very hot, clothing soaked, but never the chill or cold sweat that I thought to be a warning...World just went Black and no warning....maybe a little since knee and hand seem to be more blunt cuts and bruises, face is a scrape.
Then you had heat exhaustion. If you were still sweating (”dewing,” we are girls not horses), then it was heat exhaustion. You passed out, sounds like you went face first. Ouch!
Take care of yourself, Get a foot massage or something like that...