There are Christians that believe Once Saved, Always Saved which means you are guaranteed to go to heaven no matter how you live if you are born again. There are others who believe as a Christian you can Lose Your Salvation (Walk Away from God)because you have free will and can walk away from God.
There are Bible verses that defend both positions. There are Bible verses that contradict both positions. Here is what all Christians should be able to agree on. If Jesus is more than Savior but also Lord of lords in your life, you may fall short, may even backslide for a time, but you will come back to HIm if you are saved. We should also be able to agree it is a very dangerous thing to "play in the devil's camp".