What Causes Loss Of Sensitivity In Penis Muscle And Increased Sensitivity In Anal Muscle?

Hey Dr Lin, Hi, Im a 25 year old male. For 3,5 year ago I was masturbating and during my ejaculation i felt pain in my left testicle and its hurted for 2-4days and after its stopped but since then I slowly felt my sense of control that I normally had in my BC muscle and penis area getting worse and going away and at the same time I felt that same sense of control get uncomfortably stronger in my anus muscles. Since that day I have been in complete misery because I can no longer identify with my penis or surrounding areas AND INSTEAD I have this constant over-concentrated sense of control in my anal muscles. FOR EXAMPLE: If I try holding my pee or just contracting that muscle in general, my anal muscles contract instead involuntarily. I feel my anus contract instead of my BC/penis muscle and my erections don t feel normal at all. So to sum it all up basically I have a total lack of BC muscle/penis control AND INSTEAD I have this CONSTANT sense of anal muscle control/feeling that is extremely uncomfortable, over-exaggerated, and de-masculinizing. I also suffer from hairloss!!? What do you prefer me to do? Regards!!