The 1st question that comes to my mind is "Under what legal theory would your complaint be based?"
In general, you have to show how you have been harmed by the wrongful acts of another. Were you hurt? I would never question that, but were you harmed in a legal sense is a different question. The more important part of my question is that about "wrongful acts of another". Most jurisdictions have very specific rules governing therapist/patient relations and what is and is not allowed. I would start by looking at what specific acts you believe (and might be able to prove with sufficient investigation) were done, asking how you were directly impacted by the acts, and whether any harm was actually intended by the acts. If, after careful reflection, you believe the harm was intended, you almost certainly have grounds for a complaint and perhaps a lawsuit as well. If the harm was incidental, but clearly foreseeable from an objective viewpoint, the same answer applies. If, on the other hand, harm was not clearly foreseeable, you might reconsider filing a complaint.
All that said, you do owe to yourself and the community some duty of protection of what you perceive as potential harm. Look deep within and et your conscience be your guide. Best wishes in finding solace.