May I ask what triggers you, if talking about them isn't a trigger too.
Before I was medicated for anxiety which makes me much better I would just avoid my triggers, namely going out and dealing with people. I used to get family to go to the shops for me and I would eat my McDonalds in the car instead of inside with all the other people, now I'm fine.
As far as the voice I hear goes he's being particularly bad lately, I have a cat with a bad cough and breathing problems and he keeps telling me she hasn't got long left so I'm really mad with him, he's completely insensitive and tactless. I'd hate to see what he's like when it's my parents in ill health, he'll be a nightmare.