Morning Congestion

Savannah

So my little lady is 15 weeks old! She has transitioned into her room and sleeps pretty much through the night. She does like to sleep on her belly more so than her back (I know I'm a horrible mother but it is what it is) but lately every morning she wakes up congested and coughing. Most of the time, if not all the time, it goes away through out tjr day and just comes back around may be 4am until she's up an moving. I dont think she has reflux, the doctor never said she did. I dont think its a cold. I'm going to try saline drops and a bulb.. Her room will get pretty cold so I have a heater in there? Maybe that contributes? Idk. I will probably call the doctor just to ask! Picture of my baby for your time!