New lump found 2 weeks after chemo finished.

Hi, I finished my 7th round of chemo just over 2 weeks ago. I had a 3cm tumour at the start and 8 weeks ago I had a mammogram and scan and it had shrunk to 6mm. This morning I noticed a red patch of skin lower down on my breast and there is a lump under it.

Im due another scan on Monday before my operation which is 2 weeks after. Obviously I’m now certain I have a new tumour, has anyone else had any experience of this?

Thank you xx