3 years banded & having left side port abdominal pain. Any Advice?

Stay on top of this with your doc and pain is not normal. You are right at the stage when problems with the band start cropping up and the left sided pain is so common that it is almost a signal that revision is due. I would definately go with the sleeve if I were you, I hear nothing but good about it. Just don't suffer needlessly and get in touch with the doc very soon. Good luck hope your pain stops soon!