I'm sorry you're struggling so much with this.
There's a lot going on emotionally (and physically) with serious sh/suicide attempts. I find the word trauma confusing because different people seem to use it differently - but suicide attempts (like near death experiences) are such a huge life event that it's certainly going to have an impact.
I have had similar experiences - I really struggle with blood tests (lots of panicking!) because it's a similar sensation to sh, sometimes I get memories of different things, sometimes they feel quite physical.
Talking with your CC sounds sensible. It sounds really difficult at the moment. Even if it's what you wanted at the time, it was really the illness wanting it (if that makes sense). It is a confusing thing to get your head around for sure! I hope your CC can give some advice for how to deal with those intense memories/feelings.