7 month old Pneumonia

My LO got a fever out of nowhere last friday. It escalated quickly on saturday so we brought her to the ER where she was diagnosed with pneumonia. She's on antibiotics now for about 2 days so far. She seems to have some of her energy back, but definitely sleeping way more. She's also starting to cough more and it wakes her in the middle of the night. I keep telling myself that she's sleeping more to fight the infection, but it pains me to see her like this.

I'm a FTM so all of this scares me. Anyone else went through this with any of their LO's?