Oh, Erin, sending tons of :<3: and your way! I'm so sorry that your estrogen #s aren't cooperating right. I hope that it's a temporary setback w/ a simple fix, like E2 shots. Sending IVF your way!
I learned a big lesson through this IVF process: my impatience will not be encouraged. When I POAS too early, I got a BFN, even though it was a soon to be BFP, so this may just be a time that requires patience and faith in both the process and your body. This is another obstacle to overcome on your journey and it's not at all fair that you have to feel this pain in the middle of such a beautiful, hopeful time, but try not to despair. You are strong and positive and have a ton of support.