Reported a phishing website ahead?

Hi, I have a Tumblr account and I think it was just hacked by phishers? I have no idea how but it’s really creepy and now whenever I type in the URL a red page comes up that says “warning! reported phishing website ahead!” and I can’t see my blog anymore. Also, apparently I sent 2 messages that I never sent so someone who hacked into my account must have sent them? How do I get rid of this/is my Tumblr account screwed for good now? Has anyone else experienced this? It’s really random and creepy! I changed my password but it still says the phishing warning, does that mean I was hacked? Help!