It seems that your baby is struggling with a reflux problem. He should be seen by his paediatrician and started on the correct treatment for this problem.
I do not think that the nebuliser with saline will help his blocked nose.Try Salex saline nose drops at least twice daily and use this treatment every day. If your baby's nose does not clear up then mention this to the paediatrician as well.Also use a nasal suction device called a Nosefrida to help to clear your baby's nose.
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