IMO, you would have to be insane to get surgery with a normal working les! If your les isn't "broken" there's no surgery out there that is going to help fix something that isn't broken. All the surgerys are for bad les, unless you have a large herina.
Have you considered getting a second endo by a different dr to see if they find a herina or not? I understand desperation, have you tried diet changes, inclined sleeping, natural supplements? How long have you had this?