Lymphoma Tests - Two Year Old

Hi All,

I keep coming across this forum so I thought I'd post as I'm panicking like mad. I took my two year old to our GP and she mentioned lymphoma that she would speak to paediatrics and arrange for further tests. In the moment I didn't ask how long this would take etc and obviously I'm so scared for my son. 
 

Hoping someone can give me a little advice, I know we don't know yet but this waiting in limbo can't be nice or good for anybody.