31 weeks Spotting

Kay

Waiting to hear back from my OB but went to the bathroom and when i wiped it was brown (like old blood) mucus. Anyone else experience this? I bled off and on with my 2nd, but with this pregnancy havent, i guess it makes you worry no matter what. i have an ultrasound tuesday at 830am. I dont like pesting the drs. Baby still moving around.