I woke up the other morning and started brushing my teeth. When I spit, it was pure black. At first, I thought it was something on my tooth brush, but it was all in my mouth. I have been having chest pains and kidney pains. I woke up again this morning with a small amount of black stuff on my tongue. I am 23 and I am in the Navy. Therefore I do not want to go to the hospital on base, which is the only one that will take me because of insurance. I am planning on paying cash for another doctor. I do not know if this is related to the anthrax shots so I want to get a doctor who I know is not working for the military. At this point, I just want to know what it can be. I have smoked for about 8 years, an I have had indigestion since I can remember.