Talk to General Physician on No Appetite, Indigestion

Since last 3 weeks, I simply have no Appetite to eat anything, neither m I getting appetite of any thing, solid, liquids, juices, nothing at all. Aur na h m kuch kha rahi hn, except 1/4 of chapati for the whole day, wo bhi zabardasti. Aur ager kuch kha ln tw it feels like indigestion feeling. No constipation. And I could literally seeing not eating effects on my face. What should I do? P. S. No pregnant, unmarried.