@Finny61 have you contacted the genetic counselling department at your hospital? There isn't any gentle way to say this, but tumours are stored away for many years. I am not sure how far back! If the genetic team warrant it beneficial in your case to get access to records/pathology then the next of kin will be able to sign the release form.
I am also in my 60s, but also mindful results can be disturbing on our young childbearing age daughters. Although the brca gene is imperative that we know one way or the other. I do not carry the brca gene, thankfully.
Perhaps look into getting more details to put your mind at rest. Wishing you all the best.