Im 6 weeks pregnant with my forth child. Been having abdominal pain right around my belly button area a couple times already. Almost like a pulling painful sensation felt deep around that middle area. Its not something i feel everyday, i just felt it on day that i was on my feet a lot, walked most of the day, got home lay down and when i went to get up, i felt the painful pull, or stretching feeling. Kind a scared me because I've never experienced it before, after an hour or so of just laying still it slowly went away. Is thus common? Or any idea of what it might be? Thanks.