The point is that your baby was 'an absolute angel' until recently, so this is something new that is worrying her now. Many babies do start teething at around 4 months so this is a strong possibility. Another strong possibility and her symptoms suggest that this is indeed the main suspect now is reflux. She is refluxing and the Zantac is probably not helping enough. She should be put on Losec or similar acid reducer and probably given Motilium as well to try to stop her actual reflux.So she should see her paediatrician again.
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