I am a labor and delivery nurse, and 34 weeks pregnant with my 3rd, and have the same symptoms, as well as pain in my hips. It is worse when I try to move or turn over when I'm lying dowm, or try to get up from lying or sitting. I had it very mildly with my first, worse with my second, and the worst with this one. I attribute it to the loosening and stretching of the uterine ligaments and pelvic and abdominal muscles with each pregnancy. For the same reason your belly gets bigger earlier with each one, these structures don't support the weight of the baby as well the more prgnancies you have. I am quite sure it doesn't pose any risk to the baby, just discomfort for you. It can't hurt to mention it to your doctor, he may want to do a pelvic exam to make sure you're not dilating, but I think it is pretty common to have a lot of pressure in all areas down there, including the groin area and definitely pain in the lower back. Good luck!