How to access an account using the email address?

I had an account with a particular username and email. I logged out from my phone for a reason and i when i again logged in to the account with the same email ID, a new username popped up and I cant access my forms and the submissions.

Please Help. 

Please try to reset your account password using this email address (andreajamsine98@gmail.com).

Guide: How-to-reset-the-password

Please give it a try and let us know how it goes.