honestly i would tell your supervisor ...especially if the guy was being a jerk. tell him/her that you have ptsd due to rape and that this guy was making you very uncomfortable.

tell them this was a first for you and you didn';t know what else to do to be safe at that instant. do they have any suggestions.

i was in a similar situation at my workplace...and once i mentiuoned it my supervior backed off from giving me a ration of crap.

good luck. it's not a situation anyone should have to be in.