He had the flu not that long ago maybe a week ago and was sweating and all that. could the passing out and vomiting be caused from dehydration?
Needless to say, your stepdad needs to go to an emergency room immediately.
Loss of consciousness is nothing to fool with.
I am particularly concerned with the vomiting, juxtaposed with the loss of consciousness.
Nausea is a hallmark of a cardiogenic etiology. This does not necessarily mean your stepdad is having cardiac problems.
All hospitals will provide emergency evaluations without regard to the ability to pay. If long-term car is required there is the alternative of a clinic or finding a local Hill-Burton facility, what is funded to provide care for those who have no ability to pay for care.
You are in a rough spot, and all I can tell you is to do your best to convince him, and if that doesn't work and something bad happens, don't blame yourself.
The scenario you described mandates a 911 call and a trip to an ER as of yesterday.