help....forgot my Keychain password!!!

Hello all. I have a question about the password for Keychain: I forgot it.

A couple of days ago, I changed the login password to the user account for my MBP (cuz I forgot that too) by going through system preferences/accounts as the administrator. For the past couple of days, some of my applications has been requesting to use Keychain and I can't remember the Keychain password so I can give them permission (apparently the keychain password is my old login password as I've read in some other posts).

So is there a workaround to change the Keychain password, or do I need to create a new user account to "start fresh"? I would rather not create another user account.

Thanks in advance. And yes, I am a numbskull and from now on I am writing everything down!