What Are The Painless Lumps On My Neck?

Hi, for the last 5 months I have had 3 lumps in my neck, pea size, they do not hurt, but recently my neck aches where they are, I have been to the doctors a few times, my blood test was fine, and was told i had no infections, and to keep an eye on the lumps, I recently found a very small lump under my chin, my body is so tired i just want to lie down all day and do nothing, On a few occasions my right leg goes totally numb and im unable to walk it last a few minutes, I get bad headaches including migraines. My doctor has now put me forward to see a hematologist, in the day if i do anything little, like standing up and washing the dishes i sweat so much,this has been happening for ages now. I am getting very bad lower back pains, and stomach aches the last few weeks, as of yesterday I have felt quite poorly, and last night my neck felt swollen and realised i now have a swollen left tonsil, which is slightly white there is no pain whatsoever. Sorry for going on so long just wanted to put across everything