Tylenol is generally considered safe to use during pregnancy. It should help to relieve symptoms of sciatica. And, of course, you will want to take as few as possible. She is a physical therapist and truly knows about the pregnant body. It is not just the weight and the shift in the center of gravity that produce back pain in pregnancy.
Progesterone softens ligaments and supporting structures in the pelvis.
That means shoulders back and accentuate the curve in the lower back. Pelvic rocking is an excellent exercise and can be done sitting, standing or lying down. Just rock your pelvis back and forth. If you are on the floor, push the small of your back into the floor and then relax. Do a Kegel at the same time.