Will The Baby Gain Weight Prior To The Caesarian Section Date?

Hi,iam 33 weeks pregnant and Iam 5 feet and weigh 87 kgs at this point. But on 16th September my ultrasound showed the baby s weight to be 1.7 kgs.i was 31+ weeks pregnant then. My ob/gyn says the weight is very low. I have had previous two LSCS and this is my third pregnancy. I ve heard that doctors do not usually wait for more than 36 weeks in such cases as mine,where c section is inevitable. But my dr.wants to wait another one month and operate on 28th October,so as to allow the baby to gain more weight. What do you suggest I should do?. Is there any chance my baby can gain 3-4 pounds more before my c section date?. What should I do in order to achieve that?. Thank you.