Lung cancer ?

My husband has been poorly for a while..he's been having extremely bad coughing fits. Clear mucus (extreme amount) 

It was so bad we rang 999 at 1130pm at night, we even had to get the dfib from the shop

2   came, lots of assessments done, husband refused to go into hospital bit agreed to see the gp

Struggling to breath,  bad cough , horse voice, extreme weight loss, profound sweating at night for many months, chest pain, pain in his back and shoulder. 

He was given antique and steroids and an inhaler 

6 days layer give the same meds again.

He had bloods and an xray. No answers. He still isn't right and tonight he mentions lung cancer.

We don't know how to ask to be seen for this / tested ?

Or would the xray and bloods have picked it up please ?

Thankyou for reading. 

Kind regards 

Xx