Maybe lymphoma?

I have swollen lymph nodes in my neck, it started off 1 side but I now have swollen lynph nodes on both sides, so I have around 4 on one side and 2 on the other .These can sometimes make my neck quite achey. I was at the doc a year ago who reluctantly referred me to haematology. Whilst there I had my bloods done, he said they were all normal but I kept getting positives on the monospot test. He then done an EBV test which came back negative so he says that the monospot is giving out false positives. He sent me to have an ultrasound done and then said basically they don't look cancerous and basically if they get bigger to go back. I seen him 3 times all in and all 3 times I dropped weight. I've lost a significant amount of weight, around 4 stone in a year (i was around 15 stone) im still getting positive monospots 9 months later. I am horrendously tired to the extent, that sometimes I am too tired to do a full shift and go home.  So... no biopsy done and a wait and see.  I'm not sure where to go from here? am I supposed to feel better? Could it be lymphoma?