Your symptoms seem to fit into a condition named as Saint's triad. This comprises of hiatus herna, gallstones and diverticulosis
coli. I would suggest you to undergo a colonoscopy
immediately for diverticulosis coli.The weaknees feeling you are experiencing may be due occult bleeding due diverticular disease
. As soon as that is done you need to undergo surgery for gall stones
as they have become symptomatic. The severity of the hiatus hernia
need to be determined in order to decide on surgical intervention. If that is required and if you have access to skilled surgeon you can get both these surgeries done in one sitting.