I had laparoscopic gallbladder removal surgery 4 months ago (4 incisions). Now I'm having intense pain in the bellybutton incision site. Normal?

No. Pain this far out from your surgery could indicate that something is wrong. I would advise been reevaluated by your primary care doctor and/or surgeon.
Diff to manage. Most commonly, adhesions cause pain by pulling nerves, either within an organ tied down by an adhesion or within.See a doctor any time you experience abdominal pain, pelvic pain, or unexplained fever. Adhesions typically begin to form within the first few days after surgery, but they may not produce symptoms for months or even years. 93 %dev. adhesions after surgery, 10 % without surgery.