text: how do i know if i have a hernia? i had a baby 3 mos ago, so i have a belly.? i have a protusion starting from the top of my bellybutton about 1.5 inch long. both of my kids were very big bellies... a 10lb and a 9lb. you might have a hernia. it is pretty common, but only a doctor should make that diagnosis. you may have something completely different, so get it checked out first.   during pregnancy, your abdominal muscles "split" and move sideways to accomodate the baby. after pregnancy these muscles are very weak, and may take a while to move back to their proper position. they may even not be able to do their job in keeping your intestines where they belong!  (this is a hernia)  you will need to strengthen these muscles up so they can do their job, some gentle crunches should do the trick, but vigorous exercising can worsten this so take it easy