TMI...Mucus before period

Tiffany • Diagnosed with PCOS in 2017, TTC since 2016. Walking by faith, Not by sight!! 👑Child of God👑 💍Wife to an amazing Husband💍 👼🏾Praying to be a Mother👼🏾

So according to Glow, I’m suppose to start my period on Monday. When I went to wipe, it was rust-colored mucus. Like egg-white type cm with lite rust colored mucus. I have never experienced this before my period has started. Is this normal? Also ttc for 2yrs., Thanks PCOS!