answered question 11/6/2009 When You Become Pregnant, Do The Top Part Of Your Stomach Swell And Gets Hard And Do You Have Uncontrollable Gas? This Has Happened To Me Because I Have Missed A Period Also And I Want To Know. I have gas, low abdominal cramps, and my period has not yet came on. I took 4 pregnancy test and prayed over them all negative. I think I am pg. What do you think?