Joe!
I sense doubt and the fear of God in you!
All kidding aside, I feel you have absolutely nothing to worry about for the following reasons:
1) The Bible cant be "true" because there are too many contradictions in it. For example, one passage states that its "good works" that get you to o another states that its "faith alone". If it were true then which one of these passages would be true? Two contradictions cant be true at the same time. There are many contradictory passages and many offshoots of christianity that interpret the bible differently. You also have to remember that the Bible was put together by a church council 400 years A.D. and they decided what should and shouldnt be there instead of including all of the scriptures and it is widely believed that some things were intentionally distorted.
2) Near death research (people who were clinically dead and then brought back to life) shows that all of these people who went to heaven before they were revived and asked about hell and the devil were told that there is no hell or the devil.
3) The pope in a speech in 1999 declared that there is no hell. He said anytime the bible referred to hell, it referred to an absence of God in ones life and not a place of eternal punishment. Now these were the guys who put the bible together 1500 years ago and they are now finally coming clean. This whole satan business was just a ploy to get people to come to church.
Hope this eases your doubts and fears a little.