@Kellyk77 I massively feel for you on the SPD front. I really hope it starts to either gently ease while your in the last stage of pregnancy or just after. I'm guessing your physio has already spoken to you about SPD birthing positions if your having a vaginal delivery.
Unfortunately I was one of the ones that it didn't go away for after birth. While I had surgery for something else recently I asked the surgeon to inject the SPD area with a cortisone injection (osteopaths suggestion). It was amazing the difference it made but it's wearing off now after only 4 months. If IVF works & I end up with another c-section I'll ask for another cortisone injection while I'm numb!
A tiny tip...once bubs comes along try to squeeze your knees tightly together when you pick bubs up, or anything heavy for that matter, like the pram.