GERD, SOA, abdomen pain, and fullness

I have reflux with eating certain foods and heartburn after eating almost any food. Pepcid usually helps. Recently, I had a bad night of vomitting and ever since then I have been having wierd symptoms. If I eat a small amount of food I feel extremely full, nauseaous, have pain below the sternum and left ribs, and pain and buring all along the middle of my abdomen. This can last upto 3 or 4 hours after eating and pepcid does not help. It fells like the food just sits in my stomach. I run daily and these symptoms have made my runs more difficult. While running I feel extremely nauseous and the pain in my chest (below the sternum and left side) makes me feel SOA. It feels like there is bile sitting in the back of my throat and I can only get up the occassional belch and that doesn't seem to help anymore. Lifting and bending over make the pain worse and any kind of pressure below my sternum or left side also make the pain worse. What could this be and is there anyway I can treat it at home?