I get like that when in a heightened state...nerves? I can talk well if I'm clam but if something makes me a bit nervous I start to either stutter or say the wrong words every few words, it does annoy me but it's nothing that bothers me too much, as people do seem to understand that I clearly am nervous or in a heightened state where things don't seem to click for me, even when I'm thinking about the exact words to use they still come out wrong.
I've had problems with learning language all my live I've had help for it for year in primary/high school and I got to a standard of learning that my peers were at and they told me I'll be able to cope, which in the main I have, although some things still remain, I'd love to know if I have some form of learn disability however every time dyslexia is mentioned they just say no you don't have it without testing me, I keep meaning to speak to someone at uni about it but I never find the time to, I'd love to be tested see if there's something wrong and find ways to help it.