Hi welcome to Health care magic forum.
Thanks for choosing H.C.M.F.
As you describe you have left sided pain, some times present in right side and back also, if you sleep on left side it hurts, you have diarrhea
lasting for days, with mucous and blood.
You had C.section, hysterectomy
, and abdominoplasty
showed that the diverticulitis
of 5months old has healed .
It appears that the diverticulitis can show some effects depending on the internal tissue condition. Or there may be amoebic colitis
with recent infection.
I advise you to follow some diet recommendations as eat only curd rice or bread for few days, when you feel comfertable start taking bland foods with out spices and gastric irritants. avoid taking junk foods, and oily foods.
Wishing for a quick and complete recovery.