My little one was being sick when we switched sterilising from steam to Milton. I rinse mine with boiling water just before using and that seems to have worked! Just incase you're using Milton. Also after feeding I keep him up right and started to read him a bit of a book to keep him entertained then burp afterwards x
You can buy milk thickener called carobel I’m currently using it and it stops my little boy from bringing it up x
We were just told to pace feed and burp between and after feeds. Then of course hold them upright for 20 minutes- half an hour after every feed 🥰