Q: iPad shut down duet low battery after recharge email is now missing, any way to retrieve it?

I was in the middle of composing or replying to an important email,gmail, battery shut down and now I cannot retreive the very lengthy important email. I have tried contacting google and troubleshooting by looking in archives, deleted spam, all mail etc, 'sent' also, in case it maybe sent through a default, but not there either, archive either!  Please help!