I need help with my iPod because I have no idea what to do, help?

Question

Recently, I updated my iPod from iTunes and so I lost access to all my apps that I had on it.
A couple of days before this I had changed my email and password to something I could access more easily.
Because of this, or something that I'm failing to notice or do, I cannot access any of my old accounts on any of my apps. I have fiddled around with game center and tried to figure out if it's because I changed my email or because I updated my iPod. I am very sure that all the information is still there, I only need a way into it. How?
I am at a complete loss, and I've tried everything I can; logging in and out of game center, turnning my iPod off and on, syncing it, but nothing seems to work. Am I missing something? I would really really like it if I were told that I'm just missing something really easy and have this dealt with.
If I can't do anything, is there any way I could have any information I have on my ipod/game center put onto the email I have now?
If anyone at all can help me I would really appriciate it, even if it's like 'you forgot this, stupid'
thank you so much for any kind of help!

Answer 1

Hi Light22,
When you say you changed your email and password, did you rename an Apple ID?  Create a new one?  or just change the email linked to an existing Apple ID?
When you state you cannot access any of your old accounts, how many accounts do you have?  It's not a good idea to have things purchased with multiple accounts. App updates for example, require you to be logged in with the account they were purchased with.  It's a pain to have to log in and out of various Apple IDs to update your apps.  When an old Apple ID (email) goes out of date, people should rename it rather than creating a new Apple ID, How to change the name you use for your Apple ID
Are any of your Apple IDs disabled?  That can happen if you mix up the passwords and enter it wrong a few times.  See https://iforgot.apple.com/  to reset a disabled Apple ID (the AppleConnect password).
Make sure you are using the correct Apple ID with GameCenter, the one you set it up with.  Again, another risk of having multiple active Apple IDs.
ivan