Alhamdulillah! Nasib baik baby dah okay lepas dapat rawatan cepat, demam pada 4 bulan memang boleh jadi scary first time, but it sounds like the infection was caught early dan antibiotic dah buat keajaiban. A few of us mums in my circle also went through the same thing where hubby's cough spread to baby, so don't blame yourself, it happens! Just monitor baby's temperature still and make sure dia minum/feed well (whether breastfed or formula), sebab kena ensure baby stays hydrated masa recover. Glad she's sleeping soundly now and crying less, that's usually a good sign recovery is on the way!