Hi Brigman, we welcome your first post and are glad you decided to "speak up".
After 30 years and reading here for any length of time I'm pretty sure you know what that black BM usually means. *sigh* Heaven only knows a simple BM sample submitted to the lab can give you an answer about blood in the BM. Of course, if blood is indicated we know that means further investigation and less pleasant testing. But .... better to know and deal than stick our heads in the sand and get a NASTY surprise one day. *sigh*
Good luck and God bless!