I deleted my account by mistake — can I get it back?

If it has been less than 30 days, yes: just sign in again with the same method you always used. You will be told the account is scheduled for deletion and offered the chance to restore it — everything comes back as it was.

Once the 30 days have passed the data is anonymised and there is nothing left to restore, on our side either. Signing up again with the same address creates a brand new, empty account.