I have endo and had surgery late 2009 to remove it. I also experience the belly button pain which is worse when AF is here. I'm sure mine is related to adhesions as I know I did have alot of adhesions. It is not my belly button itself more inside underneath it if that makes sense. The left iliac fossa pain is also nasty. Even now (CD10) I can push my tummy and feel a pinching tender spot under my belly button. I dont feel bloated but only when I eat to many carbs