Sorry to hear that. I am sure somebody on here will come up with a solution, due to time zones it sometimes takes a little time. You could try a hard reset but first check to see what apps (particularly the mail app) are open and close them down. Failing that hold home button and power button down together until the Apple logo appears then release and let the iPad boot up. Hopefully, that should sort it. If not keep the thread open and await an answer. There are some really clever and knowledgeable forum members on here who will come to your aid I am sure.
Good luck