I don't know of a to fix your situation. Have you tried using lubicants? I've been in a similar situation and it was tough. I would be sore for days. I wish I could help with solution, but I can't.
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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