It seems that this might be due to 1,withdrawal side effect of quit Gutkha.
2, as your urine is yellow and there is loss of appetite, possibility of having jaundice
should be ruled out.
Go for urine for bile salt and pigment.
Go for liver
function tests like, S. bilirubin
, direct and indirect.SGOT
If this is due to gutkha withdrawal, gradually it will be alright.
If jaundice is there, consult your doctor and go for treatment.
Ok and take care.