So much pain

I'm 32+4 with baby girl #3 and I am so uncomfortable and feeling so much pain in my pelvic, back and hip areas. I go days without sleeping and I feel like I can't take much more. The only thing the doctor told me was to take Tylenol or Tylenol pm but neither of them help with the pain. I've tried pillows and heating pads, warm and cold compresses and nothing is relieving this horrible pain. I never felt like this with my other two kids this early. Any advice?