You have diastasis
From you lateral photo it appears that you have loosening of the abdominal muscles also known as Diastasis. This is why your tummy bulges out. Diastasis can only be fixed with a full tummy tuck. This procedure will require a lower abdominal scar but in return your shape and skin tightness will be much better. You should discuss with your plastic surgeon what your goals are with this procedure so you may be better advised as to which procedure will be best. Below is a link to tummy tuck before and after photos that may help you understand the options.