Each time I log in, it requires me to create a new password

In the past 2 months, I have logged in three times.  Each time I enter my password, the next screen says it appears I used a temporary password and requires me to enter a new one.  Today, I tried 4 different new passwords, none of which it would accept.  I was finally successful, but honestly don't remember now how I got there.  The last effort required them to send a code to my phone.  I finally had to close the internet tab and tried to log in again.  Please help!!!!