If your 10-month-old baby has had a fever since yesterday morning and it hasn't gone down much even with medication, it is recommended to consult a doctor. If the fever lasts for more than 48 hours, if your child's general condition worsens, or if they show signs of dehydration, it is important to seek medical advice. Watch out for other symptoms like a runny nose, dehydration signs such as dry mouth or reduced urine output, and observe their overall behavior. Administer the recommended dosage of medication based on their weight, and if the fever persists tomorrow morning, it is advisable to seek professional medical assistance.