When did you stop progesterone?

ball.and.chain

My RE had me taking PIO and Endometrin during my IVF cycle; after my progesterone level came in at 114 at my first beta on Thursday, she had me drop the PIO.  Today it was in the 90s and she told me I could stop the Endometrin.  I will be 5 wks on Thursday.  On one hand, I trust my RE and obviously my levels are great.  On the other hand, it seems to me that a lot of people continue taking it much later than this, and I am nervous about stopping.  Did any of you stop this early?

(And TIA. )