Tummy Tuck and Lipo 12 weeks ago. I'm still in a lot of pain in the lower back and front. Should I get a second opinion? (photo)

At this point in your recovery, it is much too soon to be worried about the outcome.  It takes time for the swelling to resolve.  It may be 6 months or more before the shape has reached its final look.  Be patient.   Watch your physical activity. Everyone is different.

Thank you for your question and photos.  I agree that your belly button could be improved.  I typically tell patients to wait 6 months prior to revision surgery.  The open wound could be re-excised and closed at this point safely.  I would discuss with your plastic surgeon or seek a second opinion as well to review your concerns in person. Best Wishes!