 [ Symptoms ] can i take tylenol  ibuprofen while taking cephalexin [ Disease ] if you have routinely taken your birth control pills with no lapses it would be very rare indeed to become pregnant but not impossible you should see a gynecologist immediately for a serum pregnancy test to make sure you are not pregnant no one who is pregnant should take birth control pills but you do not give any indication of being pregnant other than your perception that your abdomen looks larger normally this is not a sign of very early pregnancy under typical circumstances a woman is pregnancy does not start showing for at least four or five weeks again though just to be safe you should get to a doctor is office as soon as possible to find out for sure what is going on wishing you well