Two black black balls in yellow diarrhea that look like little blueberries, what could this be?

What you described could be undigested food items. Once diarrhea subsides and hemorrhoids are fully healed you may get a test for blood in stool. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV vaccine. Wish you good health!