Hi there, I just want to say that I went through the same sort of pain in my early twenties, so painful that I would pass out from the pain.. Usual tests and prodding, but no they said I was fine, just one of those peculiar things that happen to us at times.  Roll forward fifty years, still here, never found out what was wrong and eventually the stabbing pain went away.  I think stress is causing your headaches, so try and relax a little bit.  If you feel you need further investigations go back to your GP.  Good luck,  Carol x 

Thank you so much for replying!! I'm just such a worrier and it I just can't stop thinking about it. I'm just worried that if I go back to the doctor they won't talk me seriously because of how young I am and it's not common people at my age having bowel/stomach cancer. Did you go the doctors a lot about your problems?x

Hi Kayrohe123,  yes I did and also saw a consultant.  I know you're young but this should not stop a GP taking you seriously.  Bodies are complicated at times and you could have pulled a muscle, twisted something or many other things but to think cancer is not getting you anywhere.  I would never for one moment have thought that as we didn't have Dr Google or see cancer mentioned on a weekly basis, it was easier because you never thought the worst.  By the ago of 36 years of age I'd had a full hysterectomy due to large benign growths on my womb so it could have been those causing me pain, we never found out.  Now a little bit of advice, my husband has cancer and all the worrying in the world has not helped one jot, it basically warps your mind and causes you stress, so try and calm down and not think the worst.  Good luck, Carol x