Hi Syuas, welcome.
The 90 day famine, will help a little with any habituation you have (it takes 20-30 attempts serially for a habit to develop or be broken), but I feel that there is a deeper issue that you are starting to look at and think about.
Because of your current situation, it sounds like you feel these issues are in the realm of 'unthinkable' in your current circumstances, but seeking guidance from a therapist, will help explore them in a structured, and confidential manner, and they will help with the maze of fetish vs orientation vs identity.
As every life is different, everyone's story is different, so there is no 'one true trans narrative'. However, at some point something has arisen in our lives to make us ask questions of ourselves, that are difficult and uncomfortable and not in directions that we had assumed we would be going in.
What is then consistent afterwards, is that we are better able to make rational our lives up to that point. What was odd, and irrational, may suddenly have a simple explanation, and a good therapist will help you explore safely.
Sno