After no sleep or poor sleep, you may have trouble talking. Remember it takes energy and concentration to carry on a conversation!
I'd try to get meds straight so you can sleep. Believe you will feel better then.
and remember. When you are running from a tiger, you are not speaking. Just think about someone jogging with a friend and talking at the same time. You are not def not speaking correctly and talking (breathe) then talk because you are in a flight mode and out of breathe but it doesn't bother you then. It s*cks but good luck.
Just keep speaking. Just talk and talk and talk and it should go away. Your mind is concentrated on 'Why can't I talk right?' so it's making you panic as you speak which will do that to you. I've had times when I start talking with someone, we'll be going back and forth and then I start focusing on my health in my mind during the convo (why? I have no f*cking clue!!! :[ ) and then my speaking starts to get wierd. I'll panic, heart will race and then I have to hide and breathe for like 5 minutes to calm myself down. :( But when the situation happened agian and agian, I just kept talking and trust me I wanted to scream and run away when I'd start to panic but I just hung in there and eventually it faded. It still happens if I start thinking but I don't panic anymore about it and it'll go away within seconds.