Probably just prolonged and frequent nose blocks. Adjust A/C and fan as per baby’s requirements, use nasal drops(saline) regularly. And just check SPO2 oxygen saturations at home itself/ or at a nearby clinic to confirm proper oxygenation.
Best alternative would be to have a thorough check up by a Pediatrician.
Next Steps
Try saline nasal drops, check SPO2, consult sos
Health Tips
Do not hesitate to consult early, even if u think everything is ok, u can never be “too” careful