Hi, Let Me Start At The Beginning. 3 Days Ago

Hi, let me start at the beginning. 3 days ago I woke up, ate breakfast, lunc, and dinner (all foods I have eaten before) and I had no problems. Then that night I ate 1 hot dog and right when I finished that hot dog, I felt this discomfort (not pain) in my upper left abdomen, 1 inch below rib cage. 3 days later I still feel it. There is no pain, swelling, eating/bowel problems. One last thing... When I press on that area, I have a slight weird feeling (it is hard to describe) but feels a little like I want to vomit.