I've a slipped disc and prolapsed vertebrae from a car crash many years ago. During both my pregnancies this has been made a million times worse. And during the last pregnancy it was awful and my hips were getting displaced. I was in constant agony.
As soon as Ella was born back problems sorted themselves out. Also with the twins my hips sorted out literally seconds after they were born
I never slept on my left hand side throughout either pregnancy due to slipped disc and slept whichever way I could get comfy.
If should sort itself out -the only problems I have now is that doing too much strains my back. I was at the gym till day is Ella was born but this time round had to stop really early.