Hello, I suffer with terrible health anxiety and I’m reaching out hoping someone else could give any advice or reassurance as I am totally ill over my 3 year old son.

He has suffered with chest problems from a very early age, he had an infection in his lung at 4 months which lasted a while, I think this has contributed maybe to his chest issues now.. he is on inhalers, montelukast and steroids.. and is constantly having infections in the chest requiring antibiotic’s or a viral induced wheeze … he is not the best eater, his appetite is so poor and he’s a skinny little lad, but this worry starts way back in late 2024, he had a neck lump I noticed when he turned his head. When feeling I could feel many lumps, I took him to the gp who also felt them and in his groin, he then reffered him to paediatrics, but the paed wasn’t concerned as he had so many infections over winter plus he was in nursery . He got bloods taken and it showed a slight raise in platelets and a little low iron. No other action was taken, they weren’t concerned. 
I took him back a few times after that as the lumps never came down, was always told they weren’t concerned .. 

takes us to mid-late 2025, he started to have horrendous night sweats which is still on going, he got blood tests done , slight raise in platelets .. at the time I was worried about leukemia, he got blast cells tested which came back normal. GP wasn’t worried and requested bloods to be re done, he has had RSV, and Flu B this year plus more chest infections etc..  the lumps have never gone away, his night sweats have never stopped. I have taken him back to GP today who has requested bloods again, I really want something more doing.. I have spent my night crying looking at him that he has got something more sinister and the guilt I feel is extremely bad for not pushing for further testing a long time ago. 
I am ringing the GP back in the morning and demanding atleast an ultrasound on his swollen lymphnodes. My reason for being here is has anyone else’s child had lymphoma symptoms and it turn out to be anything else ? My anxiety is through the roof and he is my world. The thought of anything bad with him is making me ill.