A biopsy does sound scarey but it doesn't hurt - at least, mine didn't. You get a local anaesthetic first so that all you feel is a sort of gentle push, no pain. There's a pop when the sample is taken but my lady demonstrated how it sounded before she did it so that I wasn't surprised. All the staff I came into contact with were very pleasant, supportive and reassured me that they knew exactly how I was feeling and would do what they could to allieviate it.
Mine was also free moving, or not tethered as my GP called it. She referred me anyway, and during the biopsy they found a lymph node the doc wasn't happy with, so definitely cancer. Wishing you very best wishes.
Sorry to hear you have another health scare. I didn't have redness but I'm commenting because you mention a couple of times about whether the lump moves or not. My lump was also small and described as 'free moving'. My GP said it was almost certainly benign because it was free moving and likely to go away on its own. She referred me for scans though anyway (health care in Norfolk is excellent - I think they have bigger budgets here as we have a larger than normal population of older people!).
On the day of my scans at the hospital I was first seen by a doctor and student. The doctor confirmed there was a lump and said that as it was free moving it would be benign but as I was here do the scans anyway and then I could tell them at the desk that I had been told it was OK for me to go and not wait for the results. I bounced back into the waiting room full of relief.
It was during the ultrasound that the good news turned to bad - the doctor doing the ultrasound was very worried about the images and then after doing a biopsy she said that although we'd have to wait for the histology report to confirm she was sorry to say that she was 100% confident I had cancer.
I don't want to scare you, or add to your concern, but please do push for further tests and don't automatically assume that free moving means it's OK. I'm sure that statistically it probably is but it wasn't in my case.
Have you been referred for further tests? Hope you get a good result. x