I've had this problem, too. I'll start a reply, then get lost and just delete the whole thing. Usually, just add a hug. Sometimes I can come back later and post a reply when my head is in a different place.
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Bipolar I, Depression, GAD Meds: Zoloft, Zyprexa, Ritalin
"Each morning we are born again. What we do today is what matters most." -Buddha