Is this a bloody show or my mucus plug?

My due date is August 23. I had doc appt Thursday and was told I'm 1-2 cm dilated and 80% effaced! Friday I started seeing small dark mucus discharge when I would pee. Today I wiped this dark mucus discharge twice when I peed. I'm wondering if this is a bloody show or just the mucus plug?!?!?! Sorry if it's TMI 🙁