Sayang, I can really feel how stressed you are, this is so tough, especially dengan cuti tanpa gaji pa lagi. Honestly, at 3 months some babies are just really resistant and it's not something you can force; a few of my mum friends went through the same rejection even after trying semua jenis botol like you, and it does get better but needs time and patience. Since dia seems okay with the Comotomo shape tapi ada gag reflex, maybe try expressing milk into a small cup or spoon feeding for now, it's slower but some babies prefer it, dan at least tak reject, while you keep offering the botol without pressure, just during calm moments or when dia xhungry sangat. Definitely worth checking with your pediatrician to make sure there's no tongue tie or reflux issue yang bikin dia gag, because once you rule that out you'll know it's just preference and bukan medical. The rejection will soften, tapi dalam masa ni take care of yourself juga, okay?