Blood test cbc

So i had this kind of lump under my jawline and time to time i can feel it's benign. It's not painful. I can pin point the exact location. It's the size of a slight raised 0.5 cm palet. So i went to the gp to check for any lumps and he proceeded to feel for swelling lymph nodes or lumps. He told that there is no swollen lymph nodes or anything abnormal. Since he's the doctor, i trusted him with his check up. Although i can feel the discomfort travelling to the back of my right ear. Or just under it. So while at the gp he said since it's a concern, he will do a blood test. And after an hour of waiting for the results, he told me that my results are normal. Nothing abnormal. My cbc is all in the normal range. Now i'm confused. What is this feeling in my neck? Could it be a cyst? And can cbc find any cancer cells like leukaemia or lymphoma? Since he said it's normal, i would assume that cancer is out of the question. Although he did ask me if i wanted a referral letter to a specialist and i said why not. So what could it be? I'm 21 and i feel like my world is about to go crashing. Do note that i tend to get scratches very easily.