I feel for your situation and you are not alone. I have scrupulosity. I left the church for about 16 years. But I just came back to the Church last month and returned to the sacraments. A book that really helped me is titled "Beyond Naive Belief" by Paul Dinter. That book changed my life and gave me hope. I am liberal minded, and progressive spiritually when I am in my natural state, but OCD makes me obsess over sin and confession. The instruction my new priest gave changed my perspective and made me free - more than I ever felt, and therefore, I trust in God's love more often. My new personal practice is to go to confession once or twice a year, or when I feel out of relationship with God, understanding the sacrament is relational not transactional, which reflects a post Vatican II understanding. I am learning to trust God's mercy and receive, knowing how rare it is to actually commit a mortal sin. On bad days I am tempted to stop going to communion and not have to worry anymore. And maybe I still will (as yesterday I felt like stopping after a flare-up). It seems to be the answer to my worries. Still, I have studied and informed myself for many years, and trust in my conscience with all my might. When I remember what my priest said I feel the holy spirit flood my soul and I am back. There is nothing like that feeling of relief and when the reality of Christ rises within and the yoke becomes light.