Hi, you must consult your general physician first. He may advise certain tests to be done which will help us figure out the exact cause of this weight loss and loss of appetite. As per your reports and your body requirements a nutritionist/dietitian can then plan a suitable diet for you to build your health back.
Next Steps
You can contact me for the same. Would be happy to help.
Health Tips
Please do not starve yourself. Have small meals every 2 hours and drink plenty of fluids.