On post op day 18, I awakened with the same pain, same area. Spoke with a PA yesterday who examined me saying it could be an incisional hernia (but didn't see anything on ultrasound) or a residual gallstone that is still in a duct ( had gallbladder removed same time). My doctor, whom I have total confidence in, was in surgery yesterday.
So I came home, worried and scared, that it's something serious.
Wondering why you haven't reposted a follow up and so hoping you will. I have searched the internet for 4 days and you are the only one that has described my symptoms.