Awaiting breast biopsy results - meant to be getting a call today. So worried

Hi, I was recalled after a routine mammogram and had a biopsy last Monday.  The nurse said I will get a call today between 2 and 5pm.  My other half is away and I'm so worried about results....the mammogram showed a collection of white dots (calcium deposits I think?) What if they don't call? Can I call them? Thanks so much x