COVID19 scare

My grandfather just told me that he has been exposed to someone else that has been exposed to COVID19 he says the man is on 14day quarantine and that he isn’t showing any symptoms but my grandfather is a mechanic and they have been working very close now I’m panicking I feel like the risk of me and my 8 month old having it is very low but I’m still worried 😣 I plan on calling his doctor tomorrow to see what I should do