I am really sorry to hear this about your health.. I m to help you out. Hello and welcome to HCM.. I thank you for posting your query.. I being a surgeon, we encounter so many such cases.. I read your question completely and have understood it well enough.. I will analyze all your concerns point by point.. 1. Stomach upset for 3 weeks! And loose stools.. Well, this tells that you have contracted an infection. GI, gastrointestinal infection.. 2. Yes, as you tell this problem will continue and loose stools mixed with normal stools is a characteristic feature. Basically, the body will try its best to heal the problem. In process sometimes it wins and does this. But, if it fails, we see the symptoms persists. And we have to help our immune process by taking medications.. 3. And you say, you lost 4 kg weigh in 3 weeks. That is expected, and do not worry, you can definitely get back to normal shape once your problem is resolved completely.. Losing water is the worst thing, a human being can tolerate.. And this leads to weight loss.. Human body is made about more than 70 to 90 percent of water!! 4. Now, treatment for you... A. Please drink lots of water, around 4 to 5 litre a day. If possible mix with Oral rehydration solution.. B. Eat lots of fruits and vegetables.. C. Take these medication. Tablet Orni O, composition Ornidazole, Ofloxacin. Twice a day for 5 days. Tablet Pantoprazole 40mg, once a day before breakfast for 2 weeks . 5. You ll feel a lot better with these medicines.. And most importantly, stay positive. Hope this helps you, in case you need any further assistance, please let me know.. Take care and God bless. .