I have tried sitting up straight, but that seems to make my back pain worse. I have to slant back with pillows under my back. I have a doctors appointment until Wed. so I guess I have to wait till then. Thanks!!
I currently am suffering from back pain as well. I'm 26 weeks with twins and measuring 32 weeks. (for a singleton) My OB gave me a back support that goes under the abdomen and around the back with suspenders that help lift the abdomen up. I wear it when I know I'll be on my feet a lot and it seems to help! The doctor wrote me a prescription for it that I was able to fill at a medical supply store and it was only $10. Other than a back support, my doctor suggested warm baths, rotating a heating pad and ice for 15 minutes each, making sure you stand/sit up straight, make sure you sleep with a pillow between your knees to take pressure off your hips, and wear comfortable shoes. I hope it gets better for you soon!