Hi I am sorry you are feeling this way. I'm also very scared, I have been having niggling back pain only left side for several months. I also have swelling in neck (checked in March and ok) Previously been to gp few times who prescribed acid reflux tablets. Then over the last few months everything has spiralled out of control. 
I have lost almost 2 stone in weight, my back ache is now pretty constant and gets worse when I eat, and keeps me awake, the pain is radiating to my left side and abdomen.i have no appetite, greasy stools and weirdly a swollen tongue.  My skin is also really spotty and I look awful. 
I do not have juandice or grey floaty stools. 
im in so much pain. I went  back to gp a few times and had full bloods all came back clear, she just thinks I am anxious but I advocated for myself and demanded referral to gastroenterologist. I had zoom appt and now waiting for urgent CT scan, I am lucky (or so I thought) as I  get private cover through work. my experience is rubbish though, zoom appt was last week and he agreed urgent Ct but still hasn't written up the referral. I'm fuming. 

I took myself to a and e on Friday as the pain was so bad but again got fobbed off and told I had gastric issues and got a prescription for buscopan. The doctor told me I could NOT have cancer as my bloods were fine. I told him I wasnt medically trained but bloods do not detect pancreatic cancer!!! He said it would show in liver function. Again he just thought I had anxiety.  

I can't stop crying, my poor partner and family are so worried about me. Im usually super fit and healthy and happy go lucky.  I feel like im slowly fading away and nobody believes im ill.

im chasing private hospital tomorrow for CT date. I'm certain it will be bad news but I just need to know so me and my family can then deal with whatever happens. 

Sorry I have possibly made you feel worse than you were but my only advice is push and push with gp. I find it so hard but I think I should have been much more assertive earlier about my back pain . 
 

good luck