TTC at 42 with IVF

Ilean

Hi I am 42 and hubby and I are starting our <a href="https://glowing.com/glow-fertility-program">IVF</a> journey this cycle. I was given birth control to start off with I am on my 5th day. Question is I was supposed to have my period 2days ago and nothing yet is it normal or is the birth control supposed to stop my period for the <a href="https://glowing.com/glow-fertility-program">IVF</a> process? Not sure what to do hopefully I will get my period today