My lo is 5 months and she is congested really bad and has started coughing she isn't running no…

My lo is 5 months and she is congested really bad and has started coughing she isn't running no fever so idk if i should try and make a dr appointment for her or try and let it go its course. The only way I can get her to sleep is my laying her on my chest the transferring her to the bed with her sleeping on her tummy and me watching her. I hate when she don't feel good.