My iPod touch is frozen?

Just wanting to know if anyone knows what to do about this? Earlier I was syncing my iPod Touch and accidentally unplugged the cable. I thought nothing of it, plugged it back in and it continued and finished the sync. But when I took it out of my pocket a little while ago, it just displayed the home screen with the small loading circle in the middle. I didn't turn it off at all. I tried the obvious things first such as holding down the lock and home buttons simultaneously for ten seconds, but nothing happened. I'm not sure whether this is to do with the fact that the lock button is faulty (it works, but you need to press really hard to lock it). Then I tried connecting it to my Mac and the iPod made the connecting noises and started syncing, but still nothing happened on the screen. So I tried to back everything up and restore it, but an error message came up saying it could not be backed up so I restored it anyway because I synced it a little while ago. But another message came up saying it could not be restored. Now when I connect it to iTunes, I get another error message saying "iTunes could not connect to this iPhone because an unknown error occured (0xE800065)"

I'm thinking about just trying to let the battery run out and then connecting it to power?

Any help would be highly appreciated, I don't want to lose everything again 😟

Thanks a lot!