Well, God realized people we'll never be perfect, so he sent his Son Jesus Christ so that we have the opportunity to believe in him to go to Heaven.
The problem with all religion is that it calls for man to be perfect up to another man's standards...for example, completing a ritual to be forgiven.
"That if you confess with your mouth, "Jesus is Lord," and believe in your heart that God raised him from the dead, you will be saved." (Romans 10:9)
"But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. "(Romans 5:8)
Works do not get us into Heaven:
"For it is by grace you have been saved, through faith-and this not from yourselves, it is the gift of God-not by works, so that no one can boast. For we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do. " (Ephesians 2:8-10)
"For there is one God and one mediator between God and men, the man Christ Jesus." (1 Timothy 2:5)
It is proven that Christ lived. We adhere to his death by date, for Christ's sake. 2002 A.D. (after death of Christ).
Jesus account on earth claimed Himself as God in the flesh many many times.
If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness. (1 John 1:9)
So if you believe and accept in Jesus Christ as God, and ask Him for forgiveness for you sins(not a priest), you will not go to hell.
Regarding your sin being 'too horrible' to be forgiven, well, I've seen far worse. Saul, from the Bible, persecuted and put to death people for their beliefs in Christ for a time. He then realized he was ignoring the truth, and believed in Christ. He went on to become one of the most powerful Christians in history and changed his name to Paul for the hell of it to go along with it all.
So, bang a few chics at the alter and God certainly will be pissed off. Repent and believe in Him and He forgives you and awards you with eternal life. Far fetched or not, it's a risk worth taking.
I'm 100% sure I'm going to Heaven, and my workouts will kick ass there. Hope you'll join me in one someday.
There. I put that together for a fellow brother in iron so don't spit on me here please.
More of my ramblings on this crap can be found here too:
http://www.jiloa.org