DCIS high grade

Hi. I was diagnosed in January 2024 with DCIS high grade 50mm. The breast team were amazing, especially my lovely surgeon.

I had a lumpectomy on my right breast followed by radiotherapy in April. At present I am struggling with pain I have a solid hard lump. It’s tender to touch. I am unable to sleep on that side due to the pain. I have phoned the breast nurse and I have an appointment on the 25th September. I am wondering if anyone else is suffering this and is it normal.