I may have been hacked

** I think someone has hacked my account . In settings user ID says
qsm44byocjau I have no Idea why it says this and earlier today at the top right corner spinbunny was replaced with this name qsm44byocjau And now I cannot upvote . I have loged out and loged back in it has not helped except now the name in upper right corner is correct spinbunny but user ID still says qsm44byocjau Any suggestions on what I should do . Thank you in advance**