At 14, Anne was still at that stage of life where unhappiness does not necessarily show itself physically. She may have been grief-stricken and depressed but would have been still growing and developing physically, with youth and health on her side and what I can only call the Life Force bubbling away inside her. As you point out, at 19 she was described as a very pretty girl, so I don't think she had lost her "bloom" as early as that! On the other hand, I'm sure that her mother's death affected her *personality* - perhaps gave her a tendency to be depressed, for example.