Another BFN

Sh

After being 3 days late with af, it finally came right after I got back from my beta test. Onto <a href="https://glowing.com/glow-fertility-program">IUI</a> #3. My RE is putting me back on Femara but after the <a href="https://glowing.com/glow-fertility-program">IUI</a> he wants me to take progesterone. Anyone have any experiences with it?