actually, the type of therapy that helped me the most, not only with my attachment issues, but with the transference, my anxiety, self harming behaviors, and pretty much calming my over all emotional dysregulation was doing nuerofeedback therapy in conjunction with my regular talk therapy. if you decide to look into this, look for a practitioner who is familiar with Sebern Fisher's NFB protocols for healing developmental trauma.

Neurofeedback in the Treatment of Developmental Trauma | Sebern Fisher