Unwanted Anger

My mother gave me a piece of financial advice. I did not feel that was what I wanted or needed to do but listened to her anyway. Now, I regret that I did what she advised and am angry with myself for listening to her, and I’m angry at her. It is a very strong feeling. I am very angry. I am beating myself up and am having a very hard time letting it go. I lost a lot of money because I listened to her. What can I do to let go?