I'm the way, Ken -- love e-mail, and also over-rely on it myself.
A better way, in the future, is to write yourself out a SCRIPT, and PRACTICE it, ahead of time (out loud, if possible), until you've got it down. Also, you can always FOLLOW UP with an e-mail, after the in-person conversation, to clarify, backtrack, expand upon, etc., any points.
Not a huge deal -- at least you drew the line. Kudos.