It does nag you a bit to set it up so I’d have a look around to see if you did save it or write it down somewhere. See if you can remember your password, sometimes it’s a good idea to sleep on these things perhaps it will come to you tomorrow.
Because of the end to end encryption that Proton uses there is no way to get your account data back without either your password or the recovery code. Your account data is encrypted with your password, without that your data is encrypted and impossible to decrypt. Support won’t be able to help you in this case unfortunately.