You have become dependent and addicted to the use of COLACE which is a stool softener
This drug should always be used only when required and sparingly only.
In any case it should never to be used for more than a week at a stretch.
Along with eating fresh fruits and green vegetables,you must take plenty of plain water every day which shall be able to flush your bowels and you must go for regular walks and exercises.
These exercises help in increasing peristaltic movements of your intestines.
Start by reducing the dose of COLACE and gradually stop taking it.
These measures take time but you should be all right gradually.