Too many UserIDs & passwords

Weeks ago I tried to access my 2 bank accounts online. And I suffered a "memory loss" at that moment. Despite having logged in successfully just days before it, I kept keying in the wrong UserID or password until I was finally kicked out of both accounts. Last week I received the new pin for 1 account. Just logged in but was kicked out again coz I couldn't get the UserID right. There're so many UserIDs & passwords for so many sites & systems it's driving me nutz! Haiz...have to settle it at ATM....