Many women would experience a separation of the abdominal muscles in the midline known as diastasis of the muscles. This is extremely common after pregnancy
. In addition, some go on to have hernia formation in the midline which can be an epigastric hernia
which commonly occurs in the region you have described. Therefore, you need to be evaluated by physical examination and with a couple of investigations to note if you have a hernia in addition to a diastasis. In case a hernia is present, it can be managed surgically and at the same time the abdominal muscles can be brought together in the midline and plicated to give you a firm abdomen in a surgical procedure known as abdominoplasty
. Please consult a plastic surgeon for more details.