Neck lymph nodes - 1288363

It seems I'm always checking lymph nodes nowadays .. Quick back ground , 18 months ago I had a left pnuemonectomy because of suspected squamous T2N2 ... Turned out to be T4N2 because if slight laryngeal nerve invasion ( which was resected ) so even though I've had a few scares , I am coming up for my 18 month scan , about 4 weeks ago I had some slight pain in my neck on the left and had a feel and I could feel a lymph node about the size of a pea , at the time I had a slight cold so could have been from that but I decided to check in with my onc , he had a feel around and it took him a while , and a few directions from me and he finally found it , he said it wasn't very hard and there's nothing that would concern him there , but if it was still there when my scan came up , then he would order an ultra sound which he thinks will show nothing ... So here I am about a week away from my scan ( and with another respiratory cold ) and it sort of feels like it's a little bigger , I've been trying to do some research about what lung cancer feels like in the lymph ( mine sort of feels like a pimple , a bit sort of rubbery ) and also what the chances and treatment would be ... I've had a bit of a hard time he last couple of years and things are finally getting back on track , and my career is about to take off as well so I've got my fingers doubly crossed for this scan