@katrina123 I had a lumpectomy in 2016 and went on Tamaxifen. Like you, I got another cancer in the other breast anyway - 4 years later. I have been on Anastrozole for the last year or so and concerned it may not protect me.
I do understand it is not 100% protective, so I just have to hope for the best. I hope you will be ok also. It is urgent to catch these early.