Hello, chelse10e, You are in the right age group to have IBS or Irritable Bowel Syndrome. This is due to the fact your contractions in the large bowel are slower than normal. If you are also experiencing abdominal pain and bloating along with constipation, you meet the criteria for IBS. Environmemtal factors, dietary factors can aggravate the problem. Lack of adequate fiber intake and liquid intake makes this condition worse. Miralax which is polyethylene glycol solution helps to break up the hard stool and put moisture to make it liquidy. The bleeding that you mention is probably related to small hemorrhoids due to straining or a small fissure or crack around the anus. I really want you to increase your fiber intake by eating more whole grain cereals, fresh fruits and vegetables along with enough water daily. Regular excercise like walking 2-3 miles/day three times a week is very helpful. You can stay on the Miralax and adjust the dose up or down to keep the stool near normal. There are over the counter cortisone containing creams that you can apply around the anal opening to help heal the hemorrhoids and fissure if you have them. If the problem becomes severe, you should consult a gastroenterologist for further guidance. Wish you well.