Feeling so drained, in so much pain with this kidney infection so tired and headache from hell, if I…

Feeling so drained, in so much pain with this kidney infection so tired and headache from hell, if I got my antibiotics on thursday would it be ok to give it till monday to ring doctors if I'm still in pain with it as it's above your pubic area and in my back. But I explained to doctor on phone it feels like theirs something in my bladder I no I'm pregnant but it feels so different to any other water infections I've had. Has any one else had this feeling before?