Hard lymph node lump

Hi, I'm looking for any help or advice if someone has been in a similar situation as myself.
 

i noticed I had a hard lump in my neck/shoulder (bottom of neck where meets the shoulder) on the left side only. It doesn't move and is very hard, the lump is the size of a 2p coin.  I contacted the doctors and he thought maybe it was a muscle but referred me for an ultrasound, after a very nervous 4 week wait for an appointment I was seen today for my ultrasound scan. They said it looked like a lymph node but didn't look worryingsome but he would look over the images and my doctor will be in contact.

my concern is something like lymphoma. I had a blood test done and everything was fine apart from my bilirubin in my liver which was high.

im so worried and anxious and it's consuming me as it's all I can think about and I'm just worried I'll be misdiagnosed.