Same sounds like your doing good. Prop up the matress is also a good help (especially if you don't want pillows in her bed.) Make sure no fans. And if it's still not working we sometimes do zarbees cough syrup and or chest rub...
If baby girl is still congested, make sure you are cleaning out that nose when you can. The more congestion the more drainage and more cough.
Ah! All super helpful! Thank you!!!
We've done a little honey before bed and have her sleep propped up a little more. I also steam her in the bathroom with the shower on hot! It's kind of a big combination of those and what you mentioned, and it slowly will go.