Tummy Tuck Revision to Fix Belly Button and Bulge?

It seams that you still have significant skin redundancy and you can pinch much lower abdominal skin. Also, I do agree that your abodminal wall is weak. Not knowing your full medical/surgical history, I recommend to have your surgeon evaluate you for revision abdominoplasty.

#TummyTuckRevision surgery It is difficult to tell from your photos and story exactly what was done but revision would probably help youRevision surgery is unusual but may be desired for several reasons. Most revisions should be done after 9-12 months. One cause for revision surgery are “dog ears” at the ends of the incisions. These are small folds of excess skin that do not flatten over time. They can be excised, suctioned or both.Excess fat or loose skin may require liposuction and skin excision to obtain the best result.

Its normal to have some swelling
following abdominoplasty, but swelling of this magnitude five months following
surgery suggest a structural abnormality of the abdominal
wall.  In this situation a
comprehensive evaluation should be undertaken to determine the cause of the
problem.

It’s important that you return to
your original surgeon for an evaluation. 
This evaluation might require a CT scan to evaluate the integrity of the
abdominal wall.  In light of the
fact that mesh was utilized there’s a good chance that this has become detached
from the abdominal tissue.  Under
these circumstances, surgical revision might necessary to correct this problem.