Indigestion, stomach full. This month.

I was admitted to hospital a month back with high fever and head ache. I was there for three days. All tests (malaria, typhoid, dengue) came negative. However in CBC, Platelet count was low like 1.20, 1.12 respectively. I got discharged after three days. My GP suggested me to do full abdomen ultra sound. Everything was fine but spleen enlarged to 14 cm. GP told me it was because of infection I got. Again did CBC 1.4, 1.8, 1.5 respectively in next tests. I was also under lot of stress. Lost weight, lost appetite, can't feel hungry, stomach is full always. Random sharp pin like pains in liver area, stomach and chest. Can't sleep at night. Doctor gave me sleeping pills. Tried to stop taking pills. Without pills I can't get sleep. Stools are soft. Not normal tight stools. Not loose motions though. I can see some undigested  parts of food. Stool color is yellow. Now developed back pain. These symptoms  are there for more than 3 weeks. My GP gave mahacef earlier this month.