Talk to your priest, tell him you are anxious about a life confession. I made a life confession before I was baptized and it was awesome. Walked away feeling light as a feather!

Confession can also happen in layers, many times our sin blinds us from other sins and it's only after some time and repentance we begin to regain our spiritual sight.

I had had some anxiety dreams for years, they always involved being implicated in a crime and running from the authorities. A friend reminded me that troubling dreams are something that should be confessed. That week I mentioned the dreams to my confessor. He said that some times those dreams can be a sign of unconfessed sin. I immediately thought of a few sexual sins from my teen years that had weighed on me, but I had confessed them vaguely in my life confession. As I was thinking this my confessor says,"Sometimes it can even be a sin we've confessed vaguely or in part because we are embarrassed or ashamed. The Holy Spirit sometimes pinpoints sins that need to specifically confessed and brought into the light. If you can think of anything feel free to confess it now."

I was shocked, I had been planning on taking the details of these sins to my grave out of shame. I shook with anxiety, as I confessed those things. I had finally done it, I had confessed my darkest secrets, and it was met with grace and mercy, not judgment or condemnation. He reminded me that Christ loves me, and unconditionally forgives our sins. And again I walked away light as a feather, joyful, and sobered by Christ's love. I also have t had those dreams since, but I know what I'll do if they start back up!

So find a father confessor you feel comfortable with.

tl;dr Confession is like going to the doctor, you must confess the hurt and name all the symptoms of your sin. By doing this we humble ourselves and invite the Great Physician to heal our wounds! Confess your sins! Cast your burdens on Christ! The only people Christ rejects are the proud.