Jenny,
I think your voice is perfect now.
Last week, I met a teenage girl from the U.S. She was so matured, tall and beautiful. But her voice was so low, making me suspect whether she is m2f. Not. My little daughter also has very low voice, but cute anyway. Usually tall women tend to have lower voice. Compared with these women, your voice is high-pitched, and nobody will suspect anything.
barbie~~