ER+ PR+ and HER2+

I was diagnosed with Stage 2b Invasive Ductal Carcinoma that was estrogen positive, progesterone positive and HER2 positive in January 2020.  I received 6 chemo treatments initially and after a double mastectomy and 30 days of radiation (because it was found in 3 of my lymph nodes), I had 14 more treatments of Kadcyla to treat the HER2+.   Kadcyla was recently approved by the FDA at that time and was Herceptin alongside a smaller dose of chemotherapy.  The treatments were only 30 minutes each every 3 weeks and though it was still chemo, my hair did start to grow back during that time and I was far less sick.  I continue to take an aromatase inhibitor (Arimidex) daily similar to Tamoxifen for 8-10 years.  I don't have as many side effects from that drug but I did find that my thyroid couldn't tolerate any of the chemo so I am now on Synthroid for that.  I also made the decision to have a total hysterectomy at age 43 to be proactive.  I did not have the BRCA gene, but my cancer was aggressive- I felt it was better to be safe!