Im worried i may have lymphoma

Hi everyone i just wanted to ask for some advice and support 5 months ago I developed a lump in my groin it was painless for the whole time I had it until now its become painful very painful ive see a gp had a ultrasound that confirmed it was a 3cm swollen lymph node i was referred to hematology for tests ive asked for a biopsy but been refused one and no one seems to be taking me seriously ive had weight loss with alot of unexplained bruises all over my legs also extreme tiredness I honestly dont know what to do the pain is so bad thankyou for reading also infection has been ruled out