they'll probably just say swollen lymph nodes.

Hi im 18 years old and im concerned because ive had this lump on the right side of my neck for over a year now. It's above my collar bone and a little bellow my ear. I had gotten sick with two rare virus's in my throat about a year ago, after they treated me i noticed there was a lump about the size of the tip of my pinkie on my neck. My friend's mom is a nurse and she looked at it and told me it was probably swollen from getting sick. Since then the lump has not gone away. I've always had a good immune system until the past 2-3 years and have been getting sick with every type of throat sickness. Tonsils don't need removed or anything. Also i have fullness below my ribs and it's almost like my stomach is bulging there. I'm constantly tired, dizzy and nauseated... whats wrong with me?? I'm really scared and going to see a doctor soon, but would like a second opinion since they'll probably just say swollen lymph nodes because im sick! which im not.