In my experience, it was therapy what helped me leave behind those thoughts and beliefs.

You can try r/EMDR

Most damaging beliefs are the result of painful experiences that leave an impact on our brains. Therapy helped me identify the negative beliefs, identify the emotion behind them, identify the situation/s that caused it, and then (and this is the most difficult part) reconcíliate with the trauma and substitute the negative belief for a positive (and truer) idea.

It’s hard. That’s why one needs the help of a therapist to connect with these level of your identify! But I truly recommend it, and I wish you find a smart, honest, and well-prepared therapist.

Best!