If you forgot your password, then you can reset your Instagram account using your phone number, Facebook account, or an email address. If you are unable toresent your password even this way, then open the Instagram app for extra help.
Forgot Your User ID, Password, or Both
Forgot Password
First, open the app to reset the password of your Instagram account. At the login screen, press “Get Help signs in” located below Log in. If you are an Android user, then select Email or Username, send an SMS or use your FB account to log in, and enter your details and you get on-screen instruction, just follow these instructions.
If you are an iOS user, then click phone or username. Enter your username, email address or phone number then press “send log in link.”