Good morning 2x!
Obviously, everyone's pathologies are different, but I can share mine with you. Keeping in line with the fact that it seems I always go big in most everything I do, my tumor was almost 6cm.
Because of the location of my tumor (think 11:00) and it's proximity to the chest wall, we did chemo first to attempt to get clear margins. The plan was to determine mastectomy, or lumpectomy, based on the outcome of chemo.
While all my friends on bc boards had already had their surgery prior to starting chemo, I had the amazing experience of seeing my tumor shrink with each passing day. By the time I was done with tx, I could hardly feel the lump. I had surgery about a month later and all that was left was dead cells / necrosis, leading us to a lumpectomy.
So, I'm not sure about your scheduling, and I completely understand your wanting this NOW, I CAN tell you that I saw the first hand evidence that tx completely destroyed my cancer.
Do you see your Dr between now and January? It certainly wouldnt hurt to ask to bump it up a few days, if for peace of mind, if nothing else. But just remember, as nasty as chemo was, IT WORKS!
Sending you hugs. Keep us posted.