Worried - I've found a breast lump after just completing treatment for cervical cancer

Hi i have just found a lump in my breast, after having two years of chemothreapy and immunothreapy my last treatmrnt was on 7 march 2026, i have just two days ago had my 3 monthly CT scan. The reason for me having those treatments was because in 2023 i got cervical cancer, and got cleared of that then in 2024 the scan had shown the cancer had gone in to my lung, the consultant said they were speckles, and each scan i've had it has always been stable. So now having finding this lump obviously i'm worried.