My dr. told me it was dried blood, but it's not actually blood to be concerned about. You should pretend to be super concerned and DEMAND an ultrasound! Teehee.
I had brown discharge here and there starting at about 17 weeks. My doctor said its ok as long as its not a lot, red, or painful.
Consult your physician. Brown discharge isn't necessarily bad but could mean something
I have never had brown discharge but discharge is normal