I always thought i had a terrible stutter. Sometimes i don't stutter that much but in other periods of my life i do it a lot. However i watched a lot of stammer's video and.. Well, there are people who can't really say a word within 30 seconds. There's another post on /stutter that might help you (it's basically about a guy who suggests you some things you can do to stutter as less as possible). Anyways, if you need anything you can tell me whatever you want. P.S some phrasrd i wrote might be incorrect (i'm not english)