HRT and Eating

The last time I seen someone in the Gender Identity Clinic, they told me that I might not be able to receive hormone treatment if my mental health didn't improve. I have a new appointment soon and I think my overall mental health has improved a whole lot!

But another issue has come up- I can't eat well. It feels like both mental and physical barriers. I feel physically nauseous around food while having poor body image and feeling guilt after eating over 600 calories. I don't understand why I'm like this, so I don't know how to explain to whoever's going to assess me.

Do you think someone might be reluctant to give me Hormone Replacement Therapy in these circumstances? I feel much better in my mind but something I can't put my finger on is causing an aversion to food! If anyone has/had a similar situation please give me advice too.

If it matters, I'm FTM and I'm not underweight, though I'm loosing weight very quickly.