While I don't have anything that can help. I can say that I have a similar issue. Sometimes I will just talk because I can't help it. Anything I think of just comes out and there is no filter on it. This has gotten me in trouble in the past. Like just recently I got in an argument with my charge nurse over something because I just said what I felt and didn't think about it. She probably could of written me up for it if she wanted to.
Other times I will get home from whatever and think about what I had talked about while out, and be like wow I didn't want them to know that and feel this anxiety over it. Sometimes even while it is going on I will realize it and then try to filter, but it's not always successful.