"autoglass said its safe to leave"

there's your answer from a reputable company, better than advice from some random experts on the internet.

my advice, would be leave it and monitor it, it wont shatter in to a million pieces killing your wife and kids. if anything, it will crack, then the crack will grow, if that happens get it sorted.

on the other hand if you are that worried and its playing on your mind, get it sorted now as no matter who tells you what, your mind wont be at ease