ASD adult speech

Hi, i have autism my speech is good but i still find myself messing up my words. This seems to only be occuring around friends not my parents and im unsure whats suddenly started causing problems again. I've had it all my life but i notice it more when nervous or upset. I had speech classes as a kid and teen but it never went away entirely. Is this normal? Im a adult now, i also have a problem with words and expression remembering words findind the right words. Even though i know the words already i've heard them before but nothing works. Feels like my brains just lagging like a computer...it limits my communication and vocabulary drastically and is very hard.