Doctor not taking concerns seriously

Hi, I have had intense itching for over a year now which comes and goes all over my scalp, my arms and legs (occasionally back and torso) and has me scratching myself stupid. I've also lost weight, my bloods show I'm anaemic and I'm just generally unwell. 

 

My doctor won't even consider lymphoma, has no reason for the itching but won't discuss this being a possibility due to my other bloods being normal. 
 

should I continue to persist with this? Would my bloods show an issue? And would the itching come and go or be continuous?

 

im making myself ill worrying about it. 
 

thank you xx

  • Also meant to add (not sure how to edit post) I have an enlarged lymph node in my neck that has been this way for over 3 years. I've seen ENT who didn't scan it but did an endoscopy and said they felt it was just an enlarged lymph node and given bloods were normal they weren't concerned. I'm now reading all this about lymphoma can take years to be diagnosed and I'm thinking should I have pushed for a scan? The lymph node often aches like a real dull ache but isn't sore to the touch.