Suggest Treatment For Hole In The Heart Of A Premature Baby

Hello sir. My daughter is a premature baby with 4mm whole in the heart. She has completed her 6th month. Now winters are started at the very beginning she suffered from bronchitis since thn she s facing a constant cold problem like she Sneezes, at times running nose n disturb sleep,sound in breathing. Doctor asked me to gv her Nasivion pediatric drop and timinic drops. She s keeping 99.4 as body temperature since 2days. Please kindly suggest me something.