Aww, I feel you, ganyan din ang experience ko with my first! Try introducing the bottle when baby is calm pero hindi pa super hungry, at let your partner or family member give it so baby doesn't smell the breast milk and get confused. One of my mum friends swears by expressing just a little bit of your own milk into the bottle first para familiar ang lasa, then gradually mix it with formula, at eventually pure formula na, kaya naman talaga, it just takes patience and consistency, usually takes a few weeks.