"I only asked her a few questions.." to me sounds like he didn't want to discuss this with her further. PTSD is "affecting you mentally". He was being factual without getting into a gossipy session with her.

I don't think he was being intentionally rude. He could have said you now "suffer from PTSD," rather than say you were affected "mentally".. but I don't think he meant any harm by it.. IMO