Hope you feel better soon! Although I started having really bad back pain at around 25 weeks, and my stomach was absolutely huge (looked about to drop), and now at 34+4 it's even worse and I'm even bigger, people think I'm having twins like right now!!
So chances are it won't get better! But try and think about the good bit, when you're holding your LO! That's what's getting me through the SPD, the swollen and sore feet, the numb hands and the having to walk with crutches!!! Pregnancy is oh so glamorous!
Chin up xx