OK, here's my disclaimer: I'm not a doctor or health care pro, however, I have recently gone through my own cancer journey, and it was life threatening. 

Here's my question(s) to you: do you think the doctors know what they're doing and looking for? 

Would you be any happier if they'd found cancer and had given you a diagnosis/ prognosis? 

Could you explore the possibilty your fatigue, weight loss and pain aren't linked to cancer? 

I know we're all different, but for me I was quite happy whilst I wasn't given a diagnosis. I was hoping it was my gall bladder playing up. 

I'd of preferred to have gotten clear tests (as you have so far) and then given a potential for a scan in months down the line. This would indicate to me that they don't suspect cancer. 

My experience was the opposite, everything happened SUPER QUICK!! This was because they did suspect cancer, and time was of the essence. 

I'm not trying to discount your fears either. You wouldn't be normal if you weren't having some anxious thinking. It doesn't necessarily mean you've got anything major to worry about though. 

Anxiety, worry and stress can cause stomach upsets & pain. 

I wish you well and hope you can find some inner peace. :)