I had trouble, too. It flipped out right when I clicked a link to an external site a friend had posted and I was terrified that I'd gone to somewhere malware-y. I worked on it a while and then had to go do something. When I got back it was working fine. I didn't think to look at twitter! LOL
I did change my password; probably time for that anyway.
When I was trying to fix it, I requested the OTP by SMS...but it never came. I had to request via email, and it sent me the same code every time I requested it. then I got an error message when trying change my pw. That's when I had to attend to something else and when I got back everything was ok.
Do the right thing. It will gratify some people and astonish the rest. - Mark Twain