TMI pic - piece of mucus plug?

39w3d, I’ve had clear and/or white discharge past few weeks, last check @38w5d I was only 2cm and little to no effacement. Had sex this morning, cleaned my house top to bottom, did laundry, and went on a 20 minute walk. My back is usually sore at night when I’m more active during the day but goes away with rest but it’s not any better after laying down now and I wiped and found a little brown streak in thicker discharge 😱 this will be my second baby, I didn’t get to see my first mucus plug or my water because I was induced @ 41w, so praying I go into labour naturally this time!!

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