That happened to me quite recently, too, well actually a little differently: I had to have a new password because I had changed my email address and afterwards I could log in neither with the new nor with old password for the first evening. But when I tried again the next day I suddenly could log in with the new one. I will keep my fingers crossed for you that the issue shall resolve itself that undramatically as well.
But also keep in mind that the whole server is "acting" very strangely at the moment anyway.
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So long !
R³ - proud to be the official spokesman for the most noble Lady Bilqis, Desert Rose of Ironworks
Btw, the cow is queuing in the slaughterhouse right now !