I had SLNB under left arm in August, 2011. I don’t feel any lumps or bumps or anything like that, but I still feel pain sometimes, like if I press on the scar it hurts a bit or if I sleep on my left side I wake up and that area hurts for a while. Is this “normal” or should I be worried about the discomfort that it might indicate something else going on in that area, like melanoma in the lymph node basin, etc. . ? How long is it “normal” for this to go on after surgery?