Spotting while taking Birth Control

Alejandra • Married to the love of my life, IVF#1 Male infertility. Frozen transfer Sept 15. ❤️🙏🏻 Pregnant Due June 3! Miracle Baby girl is here!
Hi! I am going to do <a href="https://glowing.com/glow-fertility-program">IVF</a> and my doctor stared me on Birth Control yesterday was my 10th day and I haven't missed a pill and I take it at the same time every day but yesterday I stared spotting and this morning too. Is that normal? I called
The nurse and I am waiting for a call back. Have that ever happen to you?