Problems with my speech?

Hey guys, I was born and raised in the United States and english is my first language. I want to be a lawyer, and I know the significance of having proper speech. I recently (past 2 or 3 weeks) found myself stumbling upon random words. Im not saying that every word has a lisp or anything but a couple words a day. For example, today I was talking to someone in cl and mispronounced the word "spaced" and I had messed up pronouncing "technological". Maybe I am nervous or maybe I am having problems? (When i was a young child I had terrible speech problems) but today, everyone understands me. What is this?