Protein rich diets can cause constipation. Please check your thyroid levels . If you have this for 3 months it requires thorough evaluation . You can come to the hospital we can help you. You are already on laxatives if it is not helping we have to see why you are having this problem. Drink lots of fluids Sup duphalac 2 TSP twice a day for 3 days it is only a temporary relief but don't avoid the problem you need to get it checked