iPod not letting me do much of anything!

My iPod started randomly acting up. It made me re-enter my Apple ID millions of times. Then, it said I needed to connect to iTunes in order to receive notifications but my iPods always been connected to iTunes, and still is, yet I have no idea when people tell me anything unless I check. Also, it logged me out of iMessage and I can't log back in without a password, which I used to know, but it kept saying that it was having an error, so I reset the password, and I can't even get on my email to check the new one. I literally can't do anything. Some apps don't even let me use them because the "connect to iTunes" notifications pops up over and over again, and then I have to turn my iPod all the way off so it's reset to actually get it to work again. I've tried everything, I don't know what else to do.