After taking some type laxative that cleans you out---you may want to try a fiber water soluble supplement daily to get and keep you regular. A natural bowel regulator is Metamucil that has an active ingredient - - psyllium husk. It's both safe and a will make your BMs gentle so you won't be up and down.
Your Gastrointestinal system does not function well without at least 20 to 35 grams of fiber daily. Most of us with todays diet just don't get that amount daily. Colon cancer is the third cause of cancer deaths as well as gastro problems are becoming an epidemic ----guess why???
Lack of FIBER in our diets. Not only do people know about foods as well as drinks(intolerances) that causes chronic diarrhea and some constipation but they want a drug to fix their bad eating and drink habits.
Your Gastro system is very forgiving when you're young. But, as you age everything changes. I suggest you do everything NOW you can to make yourself healthy. You will not regret it!!!
God Bless---Harry