I’m so sorry to hear this horrible news. I’m triple positive breast cancer too and still in the active treatment with Herceptin. What are your symptoms for TC? Do you feel fatigue? How was your TSH level? Pray for you and wish you all the best!

Hello! Fellow breast cancer and thyroid cancer survivor here. I was first diagnosed with thyroid cancer [stage 1 (because of young age) papillary with 4 lymph nodes involved) in December 2021 and breast cancer (stage 1 IDC and DCIS-no lymph node involvement ER and PR+, Onco type 17) in February of 2022. There is a correlation between the two, but most doctors I have seen ignore that for some reason, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4770576/#:~:text=Rates%20of%20thyroid%20cancer%20in,treatment%20effect%2C%20and%20genetic%20susceptibility.
I had to put my RAI on hold after thyroidectomy and neck dissection in January 2022 until my breast cancer was treated first. RAI in August of 2022 after DMX with immediate recon in May 2022. Mix of Levo and Cytomel for lack of thyroid and Tamoxifen and Zoladex for BC. I continue to have nodules that are being monitored, but no major changes at the last scan. I also have a friend who had thyroid cancer over 9 years ago and then was diagnosed with BC around the same time that I was. So sorry you are also going through this. I am happy to help answer any other questions you may have. It certainly complicates things, but what has worked best for me is really listening to my body and advocating hard for care- which I have had to do this entire process. Best wishes!