I've been experiencing abdominal pain and bloatedness after eating even though i eat less, frequent burping, sour taste in mouth, the air i exhale from my nose smells and i have chronic bad breath even though i have healthy mouth. ?

Reflux: Your symptoms are suggesting gastroesophageal reflux, causes of which may be multiple. Definitely a good time to have it looked at by your physician. A gastroenterologist will likely become involved also if felt needed.

Reduce intake: If you are overweight, it is imperative that you lose weight by reducing your intake of food and increasing your physical activity.

Halitosis: Bad breath can be caused by many different factors, including sinus infections, periodontal problems, smoking, cavities, acid reflux, and your diet. Address all of these possibilities with your dentist and physician, and I'm confident that your problem will at least be minimized, and hopefully eradicated.