help!!!! my son is 2 year old. he has constipation since the last 2 weeks. however,he had his bowel movement almost everyday but it seems to be painful to him.the stool is blackish and hard.4 days ago, he keeps vomitting everything that he eats or drinks. i brought him to the doctor and she used suppository.after few seconds,everything came out.however,after 3 days,that was the last time he had his bowel movement.i am very worried.pls help me.