If the tightness is below the right ribs and if it occur after a fatty meal, it's probably gallbladder. The pain can be sometimes felt, if you press over the soft part of abdomen there. If you press on ribs and feel pain, it may be costochondritis, which usually disappears on its own after some time.
About worms - you should have stool test for parasites.
also itchy throat often feeling like hair is in throat.
also i was bit by a bunch of mosquitos this past month.
also my testicles have weird feeling inside and are suddenly moving, and not like pulsating, they are moving in strange motion. could it be a roundworm infection?