Hi there, Thanks for your query. From the information provided by you, the following possibilities come to my mind :- * Infection of the stomach by H.pylori (as manifested by chronic gastritis, nausea and repeated episodes of diarrhea. I strongly suggest that you take 2 weeks course of anti-H.pylori therapy; followed by 3-6 months of anti-acid drug, such as, omeprazole, pantoprazole or rabeprazole. Also, a deworming course every month will cure your problems. * Since you have been hospitalized a few times, a hospital-acquired infection with a bacteria called clostridium difficile is also a strong possibility. * Thyroid problem (Hypothyroidism) in view of constant fatigue and irregular menstruation. * Chronic mental stress/anxiety, which will be relieved with a few months course of anti-depressant + anti-anxiety drug combination. Consult your doctor and apprise him of my opinion. I am certain that he agree with me, order required tests, and- based on the reports- will prescribe suitable treatment as advised. If you find my response helpful and informative, do not forget an “excellent” rating to my answer, to encourage all doctors- engaged in social service- to render sound advice to the FREE queries. Fond regards and have a nice day Dr. Rakesh Karanwal