So what you are saying is that you, as a Reformed believer, could rape 1000 women, kill 1000 men, steal millions of dollars, drop atomic weapons, infect millions of people with AIDS, put thousands of people in jail on false charges, and violate every single temporal and moral law that you know of and you would still go to heaven?
Could, yes. Will? No, because God wouldn’t allow me to do it. His Holy Spirit, which resides in me, will not allow such a thing. I wouldn’t even want to try. I couldn’t contemplate me even wanting to. But, if all my sins are covered by the blood of Jesus, then ALL my sins are covered by the blood of Jesus. Every single one of them. Those I did, those I do now, and those I will do in the future.
I know you do not understand, and I understand why you do not understand. I will pray for your understanding about this. And, once you do understand... praise God!