...I just followed a link to a website about both SI and PTSD. The SI part I could read fine, but as soon as I started reading about the PTSD I found it harder to breathe and I felt sick...it still hasn't gone away yet.

It was a similar reaction to how I felt the first time I went into the dining room at school (I'd been avoiding it due to social anxiety) - does this mean I'm not doing as well as I thought I was? Am I trying to push myself too much?