Hi and welcome.

It's rather common for people with trauma and/or dissociation issues to have things "flare up" during/after major life changes, and becoming a parent is a particularly huge trigger for some people's issues. So I am not at all surprised to read what you have written here.

My suggestion to you is this: Think about what kind of help and support you need at this stage in your life to be safe and "okay" and functional, not so much about going digging to "fix" what might be "wrong" with you. The present matters more than the past so long as the past is not unduly intruding upon the present.

If you find that you are not able to function well in the present, then it might be necessary to deal with some past issues. Once upon a time, the emphasis in the treatment of dissociative disorders was to "find and heal the trauma." More current thinking is that this is NOT a good idea unless the past impedes good functioning today. Going hunting in one's psyche and memory can be quite crippling.