Bleeding brown blood

Shelby • Mommy to a sweet little girl 🌸. •September 8, 2017 👶🏽💕• Baby #2 October 2021

I'm 36w +4, and bleeding brown blood. There's not very much, but going to check again in a few. Can this be the start of me losing my mucus plug? Should I be concerned or call my doctor because of it?