Multiple Installs with Same Log-in Credentials

Using WAMP.

A bit worried. With lack of foresight, I created multiple WordPress installations with the same user credentials on the same computer. After logging into a new account, I was unable to log back into the old account, which had the same log-in credentials. However, they were on different databases. I am very new to WordPress and did not foresee this as being an issue.

I tried modifying my password for the database of the old website on phpMyAdmin, but I am unable to access/control my old website. Not sure how to regain access to it. Was my first website and took several hours to make. Any help would be appreciated.

On the other hand, I could be overlooking a very simple remedy to my problem.

Thank you.

EDIT: Solved, the fix was rather trivial – just had to log-in with /wp-admin after the site address. I really am a noob.