Back ground check

I got the job offer and accepted it but I don’t know if them moving up my start date from Aug 17 to Aug 10 is a good sign or not because I had a dui last year in July but entered a diversion program , I called the background people and they said the sent my stuff to HR Last week Thursday , on Friday after that Thursday they called me about moving my start date , I’m sitting here nervous on when there gonna call me and ask me about it or are they just gonna let me go through without calling me asking about the situation and I’m still on probation just need some advice and what this could mean.