Hello! Two weeks ago I noticed blood streaks in my child's stool plus …

Hello! Two weeks ago I noticed blood streaks in my child's stool plus the stool became liquid. We went to see the pediatrician, they prescribed Linx and Simethicone. I started giving it, it seemed like things were improving. The child is pooping less often, not as watery anymore, the blood disappeared. We finished the Simethicone treatment, but continued Linx. In the end today he pooped so much that he soiled his diaper front and back, and again with blood streaks ? He also vomited or had an upset stomach yesterday, I don't understand. Today we left the clinic, he vomited again and then lay in the stroller. There is no fever. Now he will wake up,