I can't reset your password to whatever it was previously because I don't know what that was.
In fact though you can reset your password yourself.
1. Click on the link 'Profile' which you'll see near the top of this page, to the left of your username.
2. Enter your old password and new password - in this case the easy-to-remember password, before it was reset.
3. Press 'Submit' at the bottom of the profile page.