I think my post closed before I finished. It's more wordy, sorry for 2nd post.
I'm 3 weeks post laproscopic gallbladder surgery.
Center back pain prior to surgery. First thought was muscles and bulging discs from past problems.
3 weeks later, a day after the surgery follow up and the center back pain returned at times over the last 2 days. More pain tomorrow I'm sure.

There are some bad possibilities out there. Curious if anyone has seen this or know first hand of what center back pain is when you saw it.