Don't try Harsh home remedies for 4 month old.. Give mustard oil +garlic mixed steamed massage morning and evening.... You can use baby otrivin if nose is closed.. It is common for change in weather... Will go automatically.. God bless
Yes you can switch to breastfeed.... If you can completely shift it is great for you and your child... Also if you cannot change completely do both alternatively..... Remember accumulation of milk in your breast is not good.... So breastfeed... She will catch the trend in a week.... God bless
ROY