skysblue, I'm the same way. I email my T after my session without censoring or proofreading. It pours out of me! I print my emails and reread them during the week, wondering where these feelings come from, and why do I have such a need to tell my T everything I feel about the session? Like you, if I waited, I wouldn't write what I do. She gets to see what's going on in my heart and mind, the unedited version.
I feel embarrassed sometimes too, like WHY did I tell her all that? My T doesn't bring up my emails in the session unless I do, though. But I'm surprised when she remembers what I said!

She reads them all but doesn't answer them.
I think we writers just have to write.