Is 18 and a half weeks to early

B17
Is 18 weeks 3 days too early for an accurate anatomy scan... I know this sounds weird but i had my anatomy scan at 18.3 and found out its a boy!💙🏀 anyways they said everything looks healthy and normal.. But for some crappy reason i cant help but think "what if"... So is 18+3 an accurate time to see babys organs? Sorry if its silly but thanks for helping!!! :)