Question about interview/job at krogers?

So I applied at krogers and a family member of mine who retired from krogers and had worked there 20+ years called the store manager and got me an interview with him. The same day she talked to him they called me in for an interview on monday which was three days ago. He told me about my job description for the fuel desk and what hours i would be working and what pay i would be getting. He seemed really nice and was the manager of the whole store. After that I did my drug test and background check which I know I will past both since I don't do drugs and have never been arrested. The lady told me that if i don't hear from her by monday to call her back because she said she gets busy and sometimes forgets to look. I'm just worried since its my first job and im 19 that they will stand me up or something. I mean the manager told me that since he thinks so highly of my family member that he will expect alot of me. I'm just a worry wart and can anyone give me some advice or assure me that i will not be stood up. Thanks