You're right, I've had some bad experiences with asking questions, and now they can be a huge source of anxiety which triggers a stutter or a block. I think my GP would have to refer me to a psychiatrist, I'm not too sure. My GP is friendly with my family and a generally good doctor so I thought he'd understanding about this, but he just brushed it off almost in a cavalier way. He said that he too stutters when he's under stress and then when he relaxes it's fine, so that should work for me too... but it's just not the same thing.