My Re also kept me on until week 12. I was on progesterone and estrogen until I was released from him. I think it is good for you to continue to be monitored by your RE. My OB also liked that the RE monitored me for so long bc then they know it is definitely a sustainable pregnancy.
Well your progesterone looks lovely. Most REs will keep you until week 8-12 but almost everyone I know went to a regular OB around week 8.