I can relate. I feel totally uncomfortable when speaking with others in social situations: especially with first meetings (I am terrified). I feel so self-conscious and worried, I hardly recall the introduction or conversation. (I just want to get away)

I am - generally - OK, though, in the office with colleagues, or in a familiar setting with familiar people. But not always.

Also, with people I am not completely comfortable with, I measure my words very carefully. I would like to change that very much to where I can speak naturally and not worry about what's flying out of my mouth (for fear of offending others).