@Mantis, I had a recurrence in the same breast. About 2cm away from lumpectomy scar. A bit of a shock after just finishing radiation 6 months before and chemo before that. However that was 7 1/2 years ago and all good now 😀
you are right not to go to Dr Google.
If you really want reputable information, ask your oncologist and they will refer you to reputable sites. I never googled, I just took each day as it came and when my awful recurrence occurred, I just dealt with it then. We can worry ourselves crazy about what may be, but it also may never be.
Hugs
paula xx