What Does It Mean To Have Mucus In Your Period Why Do I Have Stretchy Clear Mucus While On My Period? What Does This Mean? Is It Fertile Mucus? Help Help?

Why do i have stretchy clear mucus while on my period? what does this mean? is it fertile mucus? help help? - what does it mean to have mucus in your period

I discovered two days had seen a pregnancy test to see if it said negative, I think it's my time, and fluent, but clear, stretchy mucus with it. What does this mean?