What Causes Pangs In Upper Stomach Solar Plexus Region And Dark Urine?

Hi. I had malaria maybe two weeks ago. About 3 or 4 days after I got well I had a few beers. Now... For the past 2 days I have these pangs in my upper stomach solar plexus region. Its like the burning sensation of hunger, but I have no appetite. I have to force myself to eat. I feel nausea every time I eat or drink something. My urine is very dark, even though I ve drank at least 2 litres of water throughout the day. I m assuming its got something to do with my liver. Please advice. Thanks. Daniel.