Could my biopsy results be  wrong? I've had one enlarged lymph node on the left side of my neck for about a year, didn't think much of it. 2 months ago, one right under it swelled. I had a needle biopsy done, negative lymphoma. Now I have a group of them (5) surrounding the initial one, one behind my jaw and both under my chin and base of my skull are enlarged. My MRI showed "numerous enlarged nodes" all over my body. I've done a CT Scan, MRI, gastric screening, lung screening, bone marrow biopsy, all ok. Now I'm scehdualed for a PET scan next week. I was sent to an oncologist who told me after all those tests, she isn't "convinced" it's not cancer. I have bad night sweats for about a week at a time that have come and gone for about 6 months. My white blood cell count last week was 1.5! Extremly dry itchy skin. My blood pressure has always been low, now it's so high I am on 3 different meds to control it. I have secondary raynaulds & positive ana. Could my needle biopsy be wrong? Should I have another biopsy done?

Summarized question: Can biopsy results be incorrect?