Does anyone else get really anxious when talking on the phone? Any tips for overcoming the irrational fear?

Granted, I'm fine talking with friends & family, but when I need to call, or accept a call from, a complete stranger, I panic. It's weird, because I don't get distressed talking to strangers in person.

I've been known to agonize over making a simple phone call for days, even going so far as to script what I want to say, and wait until they aren't around so I can just leave a message. Every single time I finally do talk to a stranger on the phone, I'm fine within a few seconds, but the anticipation leading up to it is usually unbearable. Not sure why. It's silly, really.

It's weird. I can't explain what created the anxiety in the first place, or why I never seem to remember that talking on the phone isn't scary or bad.