@Chava
If you have not had it done, you can ask your doc to test you for Fibromyalgia. There are pressure points on the body that if pressed equate the diagnosis. Fibro is said to be cause unknown, but my experience is that it is directly tied to psychological stress. Most docs agree with that thought but the mechanism is not understood.
Some anti-depressants work on it. Not usually SSRI's, mostly SNRI's. Pristiq and Edronax are both SNRI's.
I know it doesn't feel like it right now, but your self-awareness and intellect will result in you getting control of both the pain and your PTSD eventually.
Maybe it will also help to join a forum on dealing with personalities who trigger you. Eg: narcissistic PD. It helped me.
Really sucks that there are so many factors to getting better. But I guess there are so many factors to life. And they got us unwell.
The one wonderful result of all this learning, especially about PD's is that you will be able to recognise the people who are not compatible with you very early on, before they get in close to you and keep them out of your life. I have to have absolutely no contact with anyone with Narcissistic PD and my life is better for it. I felt guilty at first for judging but I then learned to feel proud that I could gauge who would harm me or use me.
I hope some of this helps.