You can probably get any lost sats back by going to nostr.com again in the same browser, and looking in local storage in devtools for an entry called `wallet_info`.
there’s an entry `wallet_url` which will log you into the lnbits wallet they generated for you.
(*DON’T* clear the browser cache, log in to nostr.com again, or accept/decline any signing requests, or it the site might overwrite the cached wallet with a new one)