Sounds like you're doing just about everything a caring mama can do. Just be there for her when she's feeling under the weather, as she may not sleep as well until she fights off the infection.
Be cautious with the Vicks – I know lots of moms swear by it, but it can actually cause more congestion for those of us who are sensitive to menthol and similar strong vapors. A study a number of years ago showed that many children react to it negatively.
You might want to look up Sambucus syrup (elderberry), which is believed to be beneficial for boosting immunity against respiratory illnesses, and clearing out existing infections. The syrup is yummy, and I think a baby might enjoy it. But don't use if the recommended age range is older.
Another thought is a saline spray to loosen nasal mucus. There's a gentle spray for younger children. Again, observe the age recommendations.