Definitely worried about that. I didn't realize there was an option to back it up or attach my team to an email/facebook. Thought having it linked to my google play account was all I needed.
What about if you've not linked your team to an email address or had a chance to back it up? I had the same issue as above, but I'm struggling with how to get my team back. Put a lot of time in on the team last week and don't want to start over from scratch.