instruction: hi doctor I am 20 years old and struggling with my health right now I went to doctor and he asked me to get certain tests I have been vomiting since four months but most of the time while travelling in the metro though I have been traveling through metro since many years never faced such problem the fluid that I throw up is clear like water two weeks ago I had mild abdominal pain which roughly lasted for three days I have lost my appetite and it is resulting in weight loss I feel weak and tired most of the time my hand and leg sometimes due to headache or abdominal pain get really cold what could I probably be suffering from what am I dealing with please help
output: hello revert back with the answers to an internal medicine physician online