I particularly agree with the advice about not trusting solely on your feelings to determine your spiritual fate. The Bible tells us not to lean upon our own understanding (but to trust in God instead). In other words, even when we feel we are being rational and logical, we still can't rely on that - how much more so when we are trusting in our feelings and emotions! (It's like playing chess vs the computer; no matter how well thought out your tactics and strategy may be, you soon find out there was still a better move out there somewhere!)
There is no condemnation for those of us in Christ Jesus. (Romans 8:1) God convicts us, by speaking to our conscience to show what we have done wrong; but also offering a solution for us to make things right. Condemnation without a solution is of the devil, and we must reject it. Don't let Satan tell you you're going to Hell, when, through Christ, it doesn't need to be that way!
We all battle with condemnation and feelings of doubt at times. It can impact on our lives quite deeply in fact. But Jesus didn't come to condemn us, but to save us. That's what it says in the Bible. (John 3:17)
Rather than believing the devil's lies about you going to hell, why not spend more time in God's Word instead, building yourself up in your faith. Try to "take every thought captive", and rebuke the devil whenever thoughts of condemnation come up.
Finally, remember that Jesus really is the solution to our every problem, the solution to our deepest needs. His teachings are truly good news for us - they are life! We need to spend time meditating and practicing His teachings, which will help us move away from the chains of condemnation, and unto the glorious and abundant life which God would truly have for us.
Best of luck!