That is probobly depending on how far along you are you may feel it all the way under you ribs if you are far enough along. (around 7-9 months) If it is really low you are probobly not that far along and your uterus is stretching down there. But it could also be that you are far along and the head is engaging in the pelvis also known as lightning. It depends on where the pain is

well it stars out around the area where you wold get cramps
except it feels like a tight pinch
later on it will be a further bit down in your lower abdomen and it will be a sharp pain form your ligaments streatching