Breast bone

I have TN breast cancer diagnosis on 1st May. Feels like I’ve been waiting so long for treatment but I finally start chemo on Thursday 11th July 3 months from when I first went to my doctor. Back then I had just one symptom a inverted nipple. To now very much knowing about it. Its in my lymph nodes too. My breast has grown is heavy, discharge, discoloration. But I have increased pain in my breast bone, has it now gone there too?