Anybody faced the same?

Hi all..this is my 2nd pregnancy n its totally different from my 1st. Im currently 37+2 today (26/08/25), n last i checked on the 19/08/25 my baby weighs at between 3.3kg - 3.4kg. Having extremely painful pelvic pain n sciatica mainly due to baby's weight..Will be doing planned c-sect on the 01/09/25. Ive reached to where i cant even walk or lay down what more turn to the side to sleep anymore cuz the pressure on the pelvic is way too painful. Does anybody have any tips besides putting pillows in between my legs