Minecraft PE deleted my important servers.

Hi,
I have a server on my minecraft that I've been working on for nearly a year now. I've spent hours on end slaving away on this server, pouring everything that I have into it. Minecraft just updated on my tablet and I logged on, and every single one of my servers is gone. They're just completely gone.
Please, tell me there's some way to bring them back. I can't rebuild what I'd built, it would take another nine months. Is this just a glitch? Will my servers come back eventually? Please!
Thanks in advance.