Hello doctor I noticed 1 month ago a lymph nodes in my neck and yesterday I had an ultra sound for the neck and the results came out with 2 lymph nodes in the right side each one is about 1.7 cm and the left side 1 lymph node about 1.5 cm the nodes are painless,soft,and moveable and I only feel them when I bend my head down and start touching the under jaw line is there anything to worry about , knowing that I'm a smoker and I'm scared of a chance of having a throat cancer , should I do the CT Scan although I'm very aware of the bad effect of this scan on the long term because of the radiation , so what do you suggest I'm really paranoid and confused