How to treat my dry cough accompanied with abdominal pains and discomfort?

Hello doctor,

I am a 29-year-old male who has developed a dry cough with no fever. I have had it for a few months. It mostly happens in the evenings and almost certainly happens after I have eaten. I also find myself clearing my throat a lot. I am currently being investigated for left side abdominal pains or discomfort, which I have had for over a year. Doctors think I have IBS as it runs in my family, and I have symptoms. I need the bathroom right after eating; there is usually a lot of food on my stool. I suffer from health anxiety and have convinced myself I have bowel cancer that has now spread to my lungs. I am a non-smoker or drinker of alcohol. So far, all the tests I have done are blood, stool, urine, throat endoscopy, rectal exam, physical examination of my abdomen, and an ultrasound was performed. I am currently waiting for a colonoscopy. I have been told I have a fatty liver and gallstones. Any help on why I have this cough?