8 months old today need some advice with this cough


My son just turned 8 months old today he started having this cough and runny nose with congestion still little runny nose but no fever he having this cough I feel so bad for him his cough sounds dry/sometimes wet cough I told his doctor about it she didn’t seem too concerned just keep getting enough fluids I’ve done hot steam shower we have sat in there 10-15 mins I used the baby vapor bath I’ve tired zarbee cough and mucus I’ve used mattys baby rub and also running Vick humidifier. Can anyone else give me some more advice what I can do to help him thank you so much in advance