HER2-Positive the first time. This time?

I was diagnosed with HER2 positive breast cancer in 2015. Had a lumpectomy with insufficient margins, so I had a second surgery. I then had chemo (TCH), followed by radiation. I have been taking Letrozole (femara). Nearly five years later, I find a lump on the same breast and had mammogram, ultrasound and then a biopsy. I received preliminary results today confirming the cancer but not the other pathology. Has anyone had a HER2 negative recurrence after an initial HER2 positive cancer? I'm really hoping this time won't be HER2 positive. Thanks for everyone's support here.