Thank you for your question and photos.You do have a wide separation of your rectus muscles and the lateral border of the muscle is too lateral due to this as well. That is why you do not have much if any waistline. Yes, it is possible that you have a hernia, but it is difficult to tell without an in person examination. To make the abdomen flat, you will need an abdominoplasty with an umbilical float (you do not have enough skin for an umbilical transposition). I would also suggest liposuction of the hips/waist to improve the back curvature and waistline. The abdominoplasty in your case can be done via a short supra pubic incision only and a small incision in the belly button. The whole muscle needs to be tightened from the breast bone to the pubic bone. See a board certified plastic surgeon for an in person evaluation, examination. Good luck.