I'm already experiencing the same thing PZ along with the back rib pain that didn't happen until much later with DD. I went to a preg physio with DD and got a belt the was wider at the back and had velcro at the front which i'm using already. It definitely helps. I had terrible SPD last pregnancy and am really hoping it doesn't get that bad again. Try sleeping with your belly on a pillow at night, if I don't have the pillow I wake in the night with really sore hips. Massage around your hips and groin/pelvic area too. Hope it eases for you. And remember to be careful when going upstairs, getting in and out of bed/car etc.