Only one way to find out; go through all your accounts and try that password. Let us know... Even if the password was unique to iTunes, a key logger on your co

Only one way to find out; go through all your accounts and try that password. Let us know... Even if the password was unique to iTunes, a key logger on your computer could have intercepted it. Does Apple always use HTTPS? Otherwise it might have been intercepted when you were on an insecure wifi network.