Thanks for your query.
It is not normal to have a brownish solid looking discharge... are you sure it was vaginal and not rectal mucus ?
Specially since you spotted blood after bowel movement too?
please consult your gynecologist as in either case, it is not normal.
SInce your 12 week scan was normal, you should not panic, but it could be either a minor discharge, or could be related to some bowel pathology, for eg constipation
, fissure in ano
Sometimes, such a discharge could herald the beginning of a miscarriage
Please visit your gynecologist for thorough check up.