Jason correctly described what poison ivy reaction looks like -
pustules would be within an inflamed area, not isolated. Moreover,
aside from that, contact with contaminated clothing would produce a
reaction in the same area, not a new area every day. Especially since
you are getting new reactions after sleeping in a hotel - that pretty
much rules out the poison ivy IMHO. Irritation is irratation - redness
and swelling - is merely the body's immune system reacting to some kind
of insult. Question is what? Dunno, but, I would fire the docs who
said poison ivy.