My fiancée has a few speech problems and I'm wondering what causes it and if it could be linked to anxiety. He sometimes stumbles to find the right word--especially in front of people he doesn't know. He also mumbles a lot or says things really fast so that it's really hard to figure out what he said. He uses a lot of filler words as well. Also, at times he will repeat the last thing he said in a sentence. I think he struggles with anxiety because he has mentioned to me a couple of times that he's had a panic attack. He is a great guy but these verbal ticks annoy me at times and I don't know how to help him or even if I can.