Nervous about starting Tamoxifen

Hi there

so this is my first post. I'm not a fan usually of social network but have decided to join this group as an extra support network. I had a mammogram, ultrasound, and core biopsy last week and Friday was told that I have breast cancer. I am ER+ PR-HER2- so far that's all I know and am researching this. I had the choice to have conservative surgery and radiation or a total left side mastectomy which I've decided to do.

I've always had a few cysts in my left breast, and also have a fibroadenoma which is a benign thing too and have yearly scans for this reason but this outcome has blown me away as I didn't even notice it. I'm 43 and have no family history of breast cancer either. So I'm praying this is early stage apparently wont know that until I have my boob removed and the usual pathology so am waiting anxiously for my surgery next week. I am a nurse also which I'm thinking now is not a good thing as you can know too much, and I have also nursed some really lovely women post operatively in the medical centre where I work. So here's to us all having a good recovery. Looking forward to hearing from you all. Margie.