Alaaah sabar ye bund, ini phase je, a few of us went through the same thing around 2-3 bulan, sometimes babies just reject the bottle sebab prefer direct feeding or ada reflux yang bikin dia uncomfortable. Since baby mau direct breastfeeding, maybe lanjut je DBF untuk now dan skip bottle untuk a bit, tapi definitely check with your pediatrician sebab the spitting up + muntah tu perlu confirm okay ke atau ada masalah reflux. Kalau susu dia reject tapi dia okay with DBF, means stomach dia okay, sometimes it's just the bottle or formula brand yang dia tak suka, tapi better safe than sorry with the vomiting part