Hello and thanks for posting on the forum,

I am sorry to hear that you are concerned about your health. We are not able to diagnose any one on the forum and I can only suggest that you go back to your GP or see another GP in the practice. GP's have guidelines about when to refer patients for further tests based on their results. 

You may find it helpful reading how to get the most from your appointment written by the Patient Association here

There are other conditions far less serious then cancer that may explain your symptoms so try not to think the worst if you can.

I do hope that you feel better soon.

All the Best,

Catherine