Water Intoxication

Okay, so my son is 1 week old. I read in the book sent home from the hospital that it was okay to give my baby 1-2 oz of water in between feedings if they are fussy. So I gave him 1oz of water 2 days ago. It was infant water. I didn’t boil it just poured it straight into his bottle. Then I decided to google & now I am freaking out & so worried. Would I know by now if my baby has water intoxication?! 😩 I will NEVER give him water again I can’t believe I did that!! 😩😩😩😩💔💔💔💔💔💔💔💔💔