17 week old baby(10 weeks prem) just had usual bf then we topped him up with 80mls of formula to give him his usual vitamins/iron. Since finishing his feed, he vomited(with some force) and has since been sick 2 more times and is now retching occasionally. All this has happened in the last 40mins or so.
What's going on? Was he just too full or is he poorly??
Help, I'm a wreck!