Someone claiming to be a prophet told me something bad is going to happen to me. What do I do?
"In that day a fountain will be opened for the house of David and for the inhabitants of Jerusalem, for sin and for impurity. It will come about in that day," declares the LORD of hosts, "that I will cut off the names of the idols from the land, and they will no longer be remembered; and I will also remove the prophets and the unclean spirit from the land. And if anyone still prophesies, then his father and mother who gave birth to him will say to him, 'You shall not live, for you have spoken falsely in the name of the LORD'; and his father and mother who gave birth to him will pierce him through when he prophesies" (Zechariah 13:1-3).
"Love never fails; but if there are gifts of prophecy, they will be done away; if there are tongues, they will cease; if there is knowledge, it will be done away. For we know in part and we prophesy in part; but when the perfect comes, the partial will be done away" (I Corinthians 13:8-10).
God stated that in the same time period that a solution is given for sin (i.e. Jesus' death on the cross), there would be no more prophets. Paul also reminded us that the gifts of prophecy would end when the perfect comes. In the Greek it is clear that Paul was referring to a thing and not a person. He was referring to the perfect law of liberty (the New Testament) (James 1:25). Once the revelation was written, prophecy would come to an end.
There are no prophets today. Anyone claiming to be a prophet is lying. Any prophecy he claims to give is a lie. Therefore, ignore the fraud and go on with life. Of course something bad will happen to you -- so will something good. Life is full of good and bad events. You don't need a fake prophet to make you aware of the normal ups and downs of life.