How many years back is hypnotherapy supposed to work? For example, I’m 36 but want to tap into significant memories from when I was 2.

I had 3 near death experiences by the age of 2. Two were near drownings, and one I completely stopped breathing. I also suffer from a lot of medical issues (mostly physical) that none of my other 3 siblings suffer from, and I’m curious if any of my ailments were caused by neglect.