Looking fabulous.
I am surprised a doctor would tell you how your body will stop at a particular weight, mine just mentioned a target but said not to put pressure on myself to reach it as my body would do the work with me. Everyone's body will react differently and find its own rhythm and adjust for the changes in movement, diet etc.
I went down to 61.5kg / 135lbs and panicked a bit as I felt I looked terrible, really gaunt and tired in the face, but over the last couple of months I have gone back up a few kg to bounce between 64kg and 65kg (141lb & 143lbs) and feel and look much better for it. Your body, and your mind, will find it's healthy place soon enough I am sure.