What Causes Abdominal Pain With Bloated Stomach?

well, im a 30 yr old male, white, about 6'3", weigh about 285 lbs and i havent had a physical in a very long time. about a week ago, july 4th, i started experiencing discomfort in my lower right abdominal area, below my rib cage, more on the side than the front. on july 4th it was really bad, it had swelled up and i felt bloated and it stayed that way all day basically until the next morning when the swelling/bloating went away, but the sharp pain was still there when i coughed, sneezed and it was tender to the touch. i havent been to the doctors yet with the hopes that it would go away, but it hasnt. please help me!