What can I do?

👉Angela👈 • My whole world is my 11 year old son and my 3 year old daughter. 😍
My 5 month old just woke up screaming because she's got chest/head congestion. What are some home remedies that I can try for some comfort? We currently don't have a door to the bathroom, so I can't steam it up. Anything else I can do. So far, she'll only sleep upright in my arms.