Can’t do this 😭😭

So I’m now 38+2 weeks pregnant, I can hardly walk, my back is constantly in agony (I have a bad back anyway) and it feels like I’m carrying a watermelon in between my legs, does anyone have any advice on what I can do to help maybe reduce the pain?! Ive got a support “sausage” pillow to help me sleep but it’s just not helping 😢 my back is in so much pain, lower back and my baby is just sitting so low! I’m in floods of tears from the constant agonising pain 😥😥