It is a terrific thread. And I am worried about you. I would encourage you to keep good professional gender therapist/endo around you, will echo Aisla's sentiment on finding a stable hormone level that agrees with your core identity and physical needs, without vascilation on again off again on hormones, all or nothing.
Fluidity can be part of identity, as well as core, as well as physical, as well as presentational. They all are different factors, for me.
Its ok to be anything at any time, but important to be able to just feel without stuffing your feelings. To live. To be real. To breathe. To rest in that realness. As it changes, as it morphs based on new experiences. Need to flow with it.
Stay with us dear and post a lot and listen a lot and vent and be present. Sooner or later, things will be more clear, starting with acceptance of yourself and conditions outside yourself as they are. Once accepted, they can be changed or challenged, but the first step comes with accepting life on life's terms, and then getting beyond that.
No not easy owning a non binary identity, nor any trans identity. But we do own it. We take ownership of it, and the process of discovery probably never ends.
Be well and be careful. Testosterone and i do not mix, personally. Hormones affect people in different and big ways, so be careful with your body and sensitive to it's needs. It may be perfect for you, it may not be, it may need an adjustment. Pros need to be in on that one.
So glad to have you return to us.