End time prophets.

 Who are these 2 end time prophets? If God says that he is sending 2 witnesses, and he is, then why are there so many other people saying they are prophets? The prophecies from the prophets of old have come to pass...ive heard people say what day the world will end, what day Jesus will return, what day the 2 witnesses will be taken up, the list goes on.

 What are thoughts and feelings on this, does anyone have any insight on the 2 witnesses?