About 4 months ago I was being woken by sharp pain in my left side, I was having tests done at the time so I kind of put that in the back of my mind.About a month later the pain was in my left sides so bad were the pains I was being woken up at 4-5 o'clock each day ' I cannot bend some times breath until I have to other painkillers I take reduce some of the pain.it doesn't take all the pain away it's there throughout the day, I have spoke to my GP he arranged blood tests to check my prostrate & kidney S, thankfully the blood test ruled those organs out ,bit I am still being woken in the early hours everyday. The pain is in both sides I have been back to my GP he says he doesn't know what the pain and to more or less go away ( the pain has increased to both sides it's pretty bad pain ), I made another appointment same practice but with another dr ' he said look I can see you have spoken to dr ???? We don't know what the pains are " you have been told "we don't know ".I am still concerned the pain is severe . I was diagnosed with early stages of bladder cancer  in October 2016 and had a small growth removed successfully January 2016 they  had another look inside my bladder and it seems okay ( I wasn't having these pains at the time, can anyone help please...should I contact my bladder specialist or Liver specialist ? I'm confused seeing as my GP surgery treat it as nothing ( I don't run to my GP surgery for nothing & why are they brushing my problem under the carpet) anyone got any advice please