So, I'm supposed to start birth control on my next cycle for <a href="https://glowing.com/glow-fertility-program">IVF</a>. My October cycle is 4 days late. I have sore breasts, indigestion and mild nausea. I've made a lot of changes in my lifestyle in the past month preparing for <a href="https://glowing.com/glow-fertility-program">IVF</a>. Eating better, exercising, quit smoking. Could these have caused me to miss my period? I took a test this morning-negative. My doctor wants me to get some blood work done. HCG Quantitative and Progesterone? What are these?