If you are visiting the toilet once a week or once in a 2 weeks then the constipation is the cause of your smell.
What have you done to cure your constipation?
Have you tried to be physically active, like exercising regularly, every second or very day?
Have you tried to eliminate bread, cheese, milk and yogurt from your diet.
Some people have cured constipation by going on gluten free diet or even more extreme, grains free diet.
Some people cured constipation by going paleo diet.
Anyay, taking some magnesium may give some results.
You can take a teaspoon of Magnesium sulfate or magnesium chloride, or you can take a bath with Magnesium sulfate or magnesium chloride.
can help constipation.
FMT can help constipation.
What have you tried so far?
Double your water intake. Water, not milk, not coffee, not tea, not soda, pure water.
Eating plums can soften the stool and cure constipation.
But, diet and exercising regularly, like every second or very day is probably the most natural way to fix the problem.
The only thing you can get from your doctor is laxative, that will only solve the problem on the short run, and mask the underlying problem.