Gmail — Forget password or hack

Address:

New Delhi, Delhi, 10025

My name is khalid tanweer. And my gmail id is khalidtanweer1.[protected]@gmail.com which i have already reset it by changing a new password.But when i am putting the same password it is showing that our password has already been changed 22 days ago.I forget my password or somebody has hacked my password. I was getting the 2-step verification code on my mobile no.[protected] but unfortunately i forget my registered or helping gmail id.So please resolve my issue.I have id proof.So that nobody can misuse my gmail account

Thanks
Khalid tanweer
Registered mobile no.[protected]