I have had these symptoms too, is it really sharp sudden pain and shocks you doesn't it, then disappears as quickly as it came only to repeat again a few times?
I had this every few weeks or so during the last 9 months and brought it up with my surgeon who explained its common and its the nerves "knitting" back together again.....I have had a bypass and know you have a band but could it be the same reason?
I can really relate to this thread, thanks Emm