This is the opposite of how it's supposed to work, so I'm not sure why this is happening! You're supposed to not start bleeding until after you stop the progesterone, or at least not have a shorter LP. My LP is very consistently 14 days without treatment, so it was weird when I had a 10 day LP during an IUI cycle and started bleeding right through the Endometrin. This cycle too it was 13 days (with spotting/cramping towards the end which was unusual) while using it.

Has anyone ever had the progesterone make things worse for them? I'm using it 3x/day and my levels last weekend were fine at 29 so something must be causing it to drop.