The simpliest way to check whether your address belongs to your ledger has already been posted twice..
- In the Ledger Chrome App... click on "Settings -> Tools -> Sign Message"
See if the address that has your BTC is displayed. If it isn't, click on the address... it'll open a search box. Start typing the first three or four characters of the BTC address and see if the whole address is shown in the list. If it is, then the address is definitely part of your Ledger Wallet and you have the correct seed. - If you are using the chrome application, go to the settings and choose 'Sign message'. Then start entering this address in the drop down menu. It should appear there.
If it appears, the private key associated to this address is part of your ledger. If not, unfortunately it is not.
Please do this first to verify this address has REALLY been generated by your nano s.