To me it does not sound like it was just the medication, that caused the trauma...much of what you describe sounds like ongoing trauma, seems the medication issue also contributed. That aside though are you seeing a trauma therapist or just a regular CBT therapist? I'd certainly recommend trying to see a trauma therapist since they are specifically trained and educated to help people dealing with trauma. I myself have been trying CBT or general talk therapy for quite a while to help my PTSD and other issues...but isn't really effective. Did start seeing a trauma therapist and they use different approaches and also have more knowledge about trauma issues.

It seems a lot of regular therapists are better for people that are struggling but maybe not with such severe issues.

I will also say I do not react well to SSRIs either....or any anti-depressant I have tried, they all make me more anxious...and being more anxious can make traumatic/upsetting/disturbing things harder to deal with so I can certainly see such meds contributing to trauma issues.