IDC with nuclear grade 1 but Ki-67 is high 🥺 Clinical stage 2. Q

Hello, after almost a month of waiting for my complete biopsy results, I finally have them today. I'm ER+ 80%, PgR+ 90%, and my HER2 score is 2+. They’re doing the FISH test to definitively check if I’m HER2 positive. My nuclear grade is still 1, clinical stage 2, but I’m confused, worried, and scared because my Ki-67 is 56%. This makes me worried that I might have an aggressive type.. My doctor told me that there is a high possibility that my Her2 result is positive. 🥺 Can someone enlighten me or give me any hope despite this result? I don't know if I can sleep well tonight.