I would not take another course of antibiotics like this
this is not conventional medicine and the last two course of antibiotics have not helped you.
taking cefixime will not help your bowels either.
you need to improve your diet,
cut out gluten, pasta, bread, cereals, white flour, sodas, sugars, alcohol, milk, and eat more protein, fish, chicken, nuts, fruits and vegetables, salads, and seeds.