Finally, after battling a stomach bug for the last 2 weeks, that wasn't responding to over the counter medication I went along to see the doctor yesterday. He thinks it may be just a stomach bug and has prescribed antibiotics, if after a week the tummy is still not behaving he will get me to have a ultrasound and if something is found will organised for me to have a camera tablet(!!) swallowed and see if this discovers where the problem is.