Please help me.

Christie • Mommy to an angel. 👼 🤰🏾 With my rainbow baby boy ❤️

According to all my apps, my fertile window isn’t until Saturday. I woke up this morning to this CM. That is egg white in consistency, very stringy and stretchy, but it has blood in it. I have never ever ever had this cm in my life. Any idea what this could mean?!