It depends... If the vomit is red with little chunks then there's a good chance of bleeding in the stomach. You should call your doctor. If the vomit is just blue-ish you probably had too much Go-Gurt.
According to wedmd.com, bloody, black or tarry stool or bloody vomit. Stool may look like coffee grounds. Also, fatigue, weakness, shortness of breath, abdominal pain, paleness. For more information,...