I Have Been Suffering With Sudden Pains In My Left

I have been suffering with sudden pains in my left side for 5 days now. I am finding it difficult to sleep. lying on one side or the other seems to give relief for a minute but then the pain worsens. The pain is sporadic but is accompanied with some skin nerve sensation. Pain is somewhat like a stitch gained from running but seems to 'spider' outwards. bowel movements have been affected from my not eating my normal diet since day two, been eating mainly fluid foods (soups, custard etc ) but prior to that normal.