Sticky & Smelly Stool for 40 days. Time?

I was having regular bowel movement. I had an indigestion when I was travelling and faced constipation for 3 days. Since then, my stool is extremely sticky and has a foul smell. Even while passing gas, the smell is foul. . It has been 40 days and my condition has barely improved. The poop is so sticky that I have to pass the stool 2-3 times in a day. In these 40 days, it was just once when the stool passed easily at once. I reduced my food intake. I also reduced fat and added more protein.  There's not much improvement. Due to work needs, I was unable to have dinner on time and 3-4 times a month, I had to eat after 11. I would eat less when late as otherwise it causes indigestion. What can be the reason for a sticky stool for such a long time ?