My 3 year old son is potty training & withholding stools. I have put him on a daily regiment of Miralax as prescribed by his Dr. For the last 8 weeks. He is finally able to sit on potty & poop however, his stools have been loose & bright orang for a week. Should I stop the Miralax? Is it dangerous? Before Miralax he was passing softball size stools and withholding for 5 days at a time.