UPDATE: Ok, so my blood tests came back and I went to see my doctor again. There is only one lump now, and it only hurts when I lay down to go to sleep, or touch it. My doctor said I'm anaemic, but not as much as she thought (my count is 11.something, and she said a normal range is 12-15). But she said my white blood cell count was quite high, as if I had an infection. But I still feel fine except for lack of energy and occasional dizziness. So she gave me some antibiotics in case I have something and I have to have another blood test again in a week.
The thing I'm confused on this time though is that she wrote cervical lymphadenopathy on my blood test form this time. Cervical? As far as I'm aware my cervix is fine, and she certainly never did any sort of checks or ask any questions about anything other than my neck and how I was feeling.