I had a period about a year ago when I was really terrified for a period of time due to a number of factors, maybe a few months. I wondered if I was hearing voices. I remember I was in a really confused state because I was so terrified/anxious. I started becoming really scared of and wondering if I was hearing voices. Then I began listening to see if I was hearing voices. I wasn't sure if I was hearing voices or not. My fear was so strong that I couldn't get my grounding. I know I'm very afraid of going crazy, whatever crazy means. I'm not sure what really happened during that time. I started doing this therapy, reading a bunch of self help books, talking a lot to my best friend about it, and I think this therapy helped probably the most. I wonder if hearing voices is a self fulfilling prophecy. That's happened to me with many other symptoms I've gotten anxious about in myself. I get so afraid of it and thinking so much about it and alternately fighting and resisting it that my mind just gets super stressed out. As I spin myself into an anxious frenzy, I start believing it's true and my mind works with that belief and either makes it happen or plays tricks on me to make me think it's happening. It basically creates what I believe strongly. This therapy system talks a lot about that. It also talks about how to deal with automatic negative thoughts and how that's a big component of social anxiety. I wonder if the voices are a louder more audible version of the automatic negative thoughts and these thoughts get louder and more severe the more scared you are and the more you focus on and listen for them. I am not any qualified mental health professional but I wanted to share my thoughts in case they're helpful. I can't help but think that the therapy might help you.
I've linked to 2 other things that might be helpful.
This is an interesting ted talk about a woman who hears voices
Also, I found this man's story of having schizophrenia really interesting, helpful, and inspiring.