Try not to get too stressed Nellie ...... the 'normal' neutrophil count is anywhere between 1.5-8 ... so you are still within that 'normal range' - but obviously borderline. Your lymphocytes are also in the normal range of 1-4.8 ... so no worries there, being about half way.
Are you able to message your Breast Care Nurse or even your Onc, (your blood results should be sent to the Onc anyway for review! How long ago was your surgery & treatment? ...) With my bloods, if the GP hasn't added my Onc to get results ..... I DO! ;)
Do you think you may have Long Covid? There are so many side effects from it, they are still adding to the list, I think!
Did your GP address the soreness/tenderness under your arms? If it was an infection of any sort, that should have shown up in the bloods ....
For peace of mind, you could ask your GP to get the recent bloods also tested for the BC 'cancer markers' to be done as well (they should be able to do it to your most recent bloods - it will just need a phone call from your GP.)
If you don't think your current GP is being helpful ... is there someone else in the practice that you can 'try'?
Deep breaths, take care xx