You mean I have to do something? In that case it can be translated in several ways. どうにかしなければならない なにかしなければならない etc... It depends on a situation. Hope this can help your question. :)

Hi, is your quastion "I have to do something"? Because I fell dificult to understand smth, hhahaha, but ok なんかしなければいけない I hope it helped. Hugs from Brasil (^u^)