My kidney is in my pelvis (beside uterus) and I'm having stomach pains (lower left and right side, upper right side and diaphragm) can it be the cause?

Your pain. is much too "generalized" to be due to a single kidney being located in pelvic area.... Hope this is helpful Dr Z.
Maybe . But why wait with all this happening to you, with this history you need to be seen by your doctor, best wishes.