No flax seed is a laxative, unlike psyllium. If you are on a very low budget, you might want to go for the cleansing salad. Raw carrot fiber, like psyllium are fiber you cannot digest and end up in your stool.
Cleansing salad :
1 cup carrot pulp or grated
1 tablespoon olive oil
1 tablespoon lemon juice
raisens and anything else for flavor ( put plenty of fine herbs).
Try this at least 7 days in a row, ideally, like the psyllium cleanse, over a longer period of time.