Haha I hate it when that happens (it happens pretty much whenever I open my mouth), it just aggravates my anxiety even more. I find it really hard to repeat what I'd just said word for word for some reason, I always have to phrase it in another way :S
I think one of the worst thing's I've ever done was listen to a voice recording of myself... well we had to as the teacher played back these presentations we did in history class. Everyone else sounded fine, like their usual selves, but when it got to the part where I had to speak everyone was like "WTF?"- I sounded like a pre-pubescent mouse, I was talking ten to the dozen and it was barely audiable. So that wasn't great, it sort of confirmed to me & the whole class that I've got a stupid voice.
It can help to sip water regulary when in a social situation to get rid of that nasty sudden "croakiness" I sometimes get though.