Talk to Gynecologist on Pregnancy, Pelvic Pain

Dear Doc, AoA i am 30 weeks+ 6 days pregnant. I am facing the pain at my left side of pelvic and it goes down. Similarly the pain in left lower back which goes down to my legs. While sleeping i am having bad pain which results in headaches. What should i do to avoid the pain? I am working lady, but not have so much pain while sitting and lying but too much pain while walking and standing. My doc told its a pressure pain but any remedy to avoid it. My Bp and sugar levels are normal