This is normal for born-ins. Recruited witlesses are more likely to see that what they are doing "wrong" is actually not, but even these can feel like it could still be the truth and feel bad about doing wrong.
The only solution to this is to research, using independent sources. Born-ins are handicapped, since that is all they know and they have been shielded from outside viewpoints. However, it is still possible to research. And this can be done online. It can also be done by reading the Bible, totally without religious bias and from a neutral source. You can also get into various forums on other religions, and on their home page (there is no obligation to join).
Another angle of attack is philosophy. It is difficult to read in-depth Greek philosophy, because it is so deep. However, Plato, Socrates, and Aristotle are all well documented, and I suggest reading the outlines of each from several independent sources. You might just find that the whole Bible itself is crap. Even if not, you might be free to use just the Bible for guidance without depending on a religion to help.
Finally, you can just be objective about morality. There is no proof anywhere that people are going to heaven or hell, or that there is ever going to be a God-made paradise earth. However, your actions today can affect the outcome tomorrow. You could live for self and for society--taking a long-range outlook and doing what is ultimately good for self and society and refraining from volitional actions that are bad for self or society. Which is hard because of your programming to believe that the witless activity is good for society (life saving) and because others will make you think, by coercion and hounding, that a course that actually is good for self and/or society isn't.
You actually need to think for yourself. Once you do that, it should get easier to decide for yourself whether a course of action is actually good or bad for self or society.