I asked my dr about this yesterday because I've been having some sharp cramps down in that area and he said it was her head pushing down on my cervix. I'll be 35 weeks tomorrow.
its pressure from the waight of the baby where your not far from delivering the baby. its where he or she is low down. congrats and dont worry it happens to us all. if you get to worryed see you midwife.
im doing the same thing at 31 weeks... I lost a small part of my plug yesterday am and had to have a shot to stop the contractions at 30 weeks..