One of my triggers is my ex's name and voice. It has gotten a little better since I am dim and over time. However, I'm sharing this here as I think it's important for anyone to consider.
I changed my ex's name on my cell phone twice to this end. The first time was to another word that ended up becoming a secondary trigger. Finally I changed it to a mantra. This helps! I won't talk to him in most cases and if my son is on speaker phone with him I go into another room and turn on a white noise machine.
I also found myself triggered by things that I love — like our son! Unfortunately, this can be a side effect of abusive behavior, especially when it is aimed at hurting a mother with a child. Reading about this is important to understand a predictable behavior pattern. Trauma therapy has also helped a lot.
I have mentioned on my own thread and elsewhere, trauma is often processed visually and symbolically. Therefore, while it is a good idea to have a supportive therapist, if you find you are still struggling with side effect of PTSD (and this is completely understandable given the trauma of this experience), I encourage you to find someone who can help with trauma specifically. This may be separate from a cognitive behavior therapist, and in fact doing both in tandem can be incredibly helpful.