Reflux?

This few days, when at night i give full direct BF.. during day i give bottle.. when i give bottle he didnt vomit but at night he vomit but weird as i give direct.. then just now, after BF direct i didnt straight away lay him down.. i hold in my arms with 20-30degree .. suddenly he make sound like choke and vomit milk.. he drink milk using bottle around 50ml at 12pm then at 1.30 he want more.. i give him 40ml and fnisih..then 2.30 he want more i give direct.. thats the part he vomit.. did he too full? Its dangerous?