I have been concerned with your projected image issues since your first post.
You want us to tell you how you look, then you want us to tell you HRT is ok if you are under weight. We're not doctors. At least, not YOUR doctor.
If LOOKS matter more than health for you, your shrink may be on to something.
If HRT will not help you with your particular obsession with image (look obsession up if you think I am being trite) you should deal with it before going on your journey.
Size 0 is not a size.
I share your height. I've also, shared Kelly's minimum weight. It was unhealthy on T.
Your shrink isn't going to send you to a doctor if they fear they will be blamed for your potential health catastrophe.
Shrinks like their jobs... they like helping people. They do not want to lose either.
Nor would I.
Aloha,
Tori