@Cookie42 It is great that you are getting to the root of the problem with your psychologist, but I can totally hear your angst around money. You are right in thinking that realistically, the issue is unlikely to be resolved in ten sessions. The ten-session thing makes me super cranky because really, only the most minor of issues can be meaningfully addressed in that sort of time frame.
I wonder if it might be worth talking to your psychologist about any other funding you may be eligible for. For example, I am currently receiving funded sessions through the NSW victims of crime program. I only heard about this program after going to the Royal Commission into child sexual abuse, despite the fact I have been dealing with mental health services for about twenty years. This makes me wonder what other funding there might be out there for people in various situations across the various states of the country.
As to why your stuff is manifesting now when it relates to something that happened when you were a child, this is a very common experience. I don't really know why - the brain is a mysterious thing. However, you are certainly not alone in experiencing this.
I'm really pleased that you have discovered the forums @Cookie42. I hope you find them as supportive as I do. 