Oh mama, we went through almost the exact same thing, my son did this around the same age and it was so stressful! What helped us was trying different bottle teats (we switched to a softer, slower-flow one) because the sucking motion during teething can cause gum pressure that makes the usual teat uncomfortable, even if he's fine with a pacifier since that requires less suction force. My friend actually brought her baby to a PD at KKH when this happened and the doctor mentioned that sometimes it is not just teething but also a combination of things like mild tummy discomfort or even the baby starting to prefer solids over milk at this stage, so do not assume it is purely the teeth. One thing that did NOT work for us, honestly, was the cold milk trick, baby still rejected it, but some mums swear by offering milk more frequently in smaller amounts throughout the day rather than sticking to a fixed schedule, so the baby does not feel pressured. Worth checking in with your own PD though, because if the rejection goes on for more than a few days it is good to rule out anything else going on physically.