Progesterone question

I started an <a href="https://glowing.com/glow-fertility-program">IVF</a> cycle and got switched to an <a href="https://glowing.com/glow-fertility-program">IUI</a> cycle. They still had me do progesterone shots. My TWW was up on Wednesday. I did a hpt that morning and got a BFN (dollar store test). I still haven’t started my period and did t test this am. So, my question is, could the progesterone shots be keeping my period from starting?? TIA!