First, resetting your nano wasn't necessary. The nano s just supports different types of addresses to store your coins on.
Now, that you have resettet your nano s with (hopefully) the right seed phrase, check which blockchain you are using at the moment at the top right corner.
You have to click on Settings -> Blockchain. Then choose Bitcoin (assuming you are talking about the original BTC bitcoin and not BCH bitcoin cash).
Now regarding wheter you used an address in legacy or in segwit format you have to click the corresponding button.
Do you remember how the address on your ledger you sent the funds to started? Probably with an 1 or 3?
If it started with an 1 you need to click on legacy, with a 3 on segwit.
You don't have to worry about your coins getting lost. You can 'switch' between these two formats without any problems.