Breast Radiation Effects

Hi

I finished 4 weeks radiation last December after a lumpectomy for Stage 1 Lobular Carcinoma. I am due back for mammogram in September.

my breast tissue seems to have changed a lot, it can be sore and feel hard in places. My breast will have an indent where I lie on it at night. 
 

just checking in if these things  are just normal changes as I can't feel if I have a lump anymore as all the tissue is kind of hard in places and feels lumpy. Feel well and taking tamoxifen.

Thanks!

J x