Hi Thelma1
I had callbacks every year for 4+ years after my lumpectomy and radiation - and had biopsies every time. Thankfully, It was always either scar tissue or necrotic something ... but it brought on 'scanxiety' every time tho!
My original cancer had been missed by Mammogram & was found by my GP 4 months after a 'clear' Mammogram! Pretty sure it was the Ultrasound that I have yearly now, that picked up the 'issues'.
They are just being super careful & getting anything tested, 'just in case' ... which is a good thing
Take care & I hope your next scan is clear xx