Hi. I had my second vaccine on 2nd July, 3 weeks  ago I noticed a lump in my left armpit, same side as the vaccine. I have had a chest X-ray, clear. Bloods taken, slight raise in white cell count, antibiotics, 2 ultrasounds and it's the axcillary node that is swollen. I am being scanned again in 3 weeks time and if it has not gone down they want to do a biopsy. Can someone please tell me if this node will ever go down? I do not want to be having a biopsy if others have experienced weeks of the lump not going down. It only measures 7mm but feels huge and annoying and uncomfortable.