Maybe I should just forget it ? Very discouraged and wondering how to discern whether to continue with this.
What led you to consider making a general confession in the first place? I did it once when going through the spiritual exercises of St. Ignatius, but as someone prone to scrupulosity and second-guessing myself in general, I don’t know how healthy it was for me, personally. Of course, if I hadn’t gone, I’d be second-guessing whether or not I should have gone.
Do you have any orders of priests near where you live? We have a Norbertine abbey in my area where the priests have a little more time to hear a general confession. A parish priest may worry that hearing a general confession will take too long. (Actually, it should only take 15 to 20 minutes if you prepare well, which is why I mentioned preparation in an earlier reply.)
The way I was told to prepare was to start at age 7, the presumed age of reason, and look at my life over blocks of time. So, there was elementary school, high school, college, the remainder of my twenties, then my thirties, and so on. For each time block, I went through the commandments and looked at what sins I had committed against each, venial or mortal, and for mortal sins, approximately how many times I had committed each sin. I wrote everything down on a chart to help me remember. Prep time was at least two hours, but the confession went pretty quickly – "From age 7 to 12, I believe I took the Lord’s name in vain approximately X times. I lied to my parents approximately X times … " and so forth. No stories about why I committed various sins – just the sins themselves. There’s some guessing, because there were certain sins I was likely to have committed daily or more at certain times. At the end, I said something like, “For these sins and any sins that I have forgotten or am unaware of, I am truly sorry and ask for God’s forgiveness.” I brought my chart with me to the confessional and shredded it afterward.
Maybe if you let the priest know that you will be organizing your confession to make it brief, he will be more receptive to taking the time to hear it. Whatever you decide, God be with you, and may you find the peace you seek.