Keychain password and restore Mac?

Ughh! My MacBook Pro is driving me crazy! Tonight, out of nowhere it has started giving me warnings that "accountsd wants to use the "login" keychain" and multiple other alerts. Problem is, none of the keychain passwords are matching my log-in password. I have no idea how to correct this. I have everything backed up---any advice? I cannot connect to my email--icloud or the appstore 😟