I have stage 4 terminal bone lung lymph node cancer.Currently under my left arm I had a mastectomy on that side over 4 years ago.My lymph node is really swollen really big lump.It is causing me a lot of pain.Really scared of going to hospital not been to no appointments or checks in a long time as anxiety takes over me.Really worried what this pain is its affecting my left side please can anyone advise thank you.