Do you get vomiting immediately after feeds or after few hrs. Weight loss is significant. Get ultrasound abdomen  done if found normal then get endoscopy done.also need to see degree of dehydration.

[ ] Hi as your symptoms are suggestive of gastritis and GERD. Follow some life style changes : stop tea coffee. Avoid spicy food. Don't eat cabbage / capsicum/ don't drink / eat citrus fruits. If symptoms persists then It's better to get a upper Gastroscopy done to rule out ulcers/ erosions/ presence of H.pylori infection. By then you can take tab. PANTODAC DSR (1-0-1) HALF AN HOUR BEFORE MEAL FOR 7 DAYS. Sup. GAVISCON 10 ml THREE TIMES A DAY AFTER MEAL FOR 10 DAYS. Report the progress. Feel free to ask any further quary related to your problem.