Hi there,  l can understand your mind is all over the place,  l can empathise with you,  l too have developed a large lump in my neck. I've been seen by a ent specialist fast tracked by my gp  during my first appointment he just asked questions and examined my neck and put a fine tube up my nose and down my throat,  it was painless and over in a couple of  minutes he then said l will need a ultrasound scan and a biopsy, a fine needle aspiration , I've just received my appointment for 5  May,  I assume you will probably have the same tests,  from what I've been told they are very quick and simple tests.

I know it's easier said than done but try not to worry the waiting is the worst part,  take care and let us know how you get on.