Sharing painful or traumatic experiences with someone can be incredibly healing and uplifting, whether that be with a professional or trusted confidante. In Alcoholics Anonymous, they have a mantra “you’re only as sick as your secrets”, and that can be incredibly true when someone is dealing with trauma without ever telling anyone.
Another risk to not telling anyone about your trauma is that it can lead to manifestations in negative ways, like addictions or self-harm. However, you want to ensure the person you decide to share with is respecting your emotions and experience as well as creating a safe space for you to share. Sharing can be incredibly healing and free you from guilt and many other symptoms, but if the process is too painful, consider another alternative, like writing.