How to diagnose lymphoma?

I have had strange bumps under my tongue for years. Now bumps on right arm, eatin it up alive. Fluid in collarbone and lumps in breast and glands in front of armpit. My PCP has ignored me. Oral surgeon said “There is something there,no need to biopsy.“Going to oncologist surgeon to remove lumps. Got MRI of arm that will be read Monday. Only diagnosed with fibromyalgia. Went to blood hematologist who said i just normally have high white count, and teased about doin spinal tap. That sounds awful. Very frustrated with physicians. No pain meds. If the guy Monday doesnt get the picture, I have nowhere else to go.My sister died of leukemia in 1962.