Be careful who you follow. Everyone who is prophesying in God’s name isn’t necessarily sent by God.
One of the many ways I practice is to ask someone their views on the Trinity. I also ask them what do they think about Jesus.
All we have to do in most cases is just listen to if their message. If their message isn’t sound doctrine then it’s false. How do you know if it is sound doctrine? You have to study to be approved.
“Then the LORD said to me, “The prophets are prophesying lies in my name. I have not sent them or appointed them or spoken to them. They are prophesying to you false visions, divinations, idolatries and the delusions of their own minds. Therefore this is what the LORD says about the prophets who are prophesying in my name: I did not send them, yet they are saying, ‘No sword or famine will touch this land.’ Those same prophets will perish by sword and famine. And the people they are prophesying to will be thrown out into the streets of Jerusalem because of the famine and sword. There will be no one to bury them, their wives, their sons and their daughters. I will pour out on them the calamity they deserve.” Jeremiah 14:14-16 NIV