Okay so there's something I've noticed that's been happening a lot over the past few months and no one has really given me a soild explanation so I thought, "why not ask the internet?" 
Anyway, the issue that's come to light is I'll be in a conversation (either in person or over text/ other means of electronic communication) and I will find myself saying quite rude things to people and don't really realize what I've said until it happens. It's causing a lot of fights with my friends, family and S/O. I don't know if it's the start of something or noting to be concerned about. I'm open to all advice.