is it possible that someone on the net save this request
Since HTTPS is usually end-to-end encryption that someone needs to be at one of the ends, i.e. in the client (bad browser extension or similar) or the server (compromised server) to get the unencrypted request. The encrypted data will be of no help.
In case of legal SSL interception in firewalls that someone can be also there to access the request in plain. Illegal SSL interception (man in the middle attack) is similar, but in this case you get a browser warning which you should not ignore.
re-send it later to authenticate on my web site
If the data are grabbed then they can be resent.