Facing the Uncertainty of Follow-Up Nodules Post-Treatment

I was diagnosed with breast cancer (IDC, ER+/PR+/HER2-, 1.5 cm, Stage 1 Grade 2) and treated with a lumpectomy, radiotherapy, and I’m currently on ongoing hormonal therapy.

On April 28th, I had a follow-up ultrasound. The results were somewhat reassuring — BIRADS 3 — and they found a small node in my left breast that appears to be benign. However, during my follow-up appointment with the oncologist yesterday, she expressed concern about this finding, which has left me feeling anxious as well.

I have a follow-up appointment scheduled for tomorrow with my breast surgeon, who has been monitoring me every four months.

Before my breast cancer diagnosis, I had several benign nodules. My main question now is:

How is this situation typically handled in the long term?
Does every new nodule mean going through a biopsy due to my history of breast cancer? I’m 44 years old — what does this mean for the years ahead? Will I be facing this level of uncertainty and follow-up indefinitely?