RSV can be some nasty stuff.
Watch for high fevers and trouble breathing. Rapid breathing, or tugging around the collar bone and sternum or under the ribs, can be signs that she's having difficulty. RSV landed my son in the hospital for 9 days when he was 10 months old, and his complete recovery took close to 3 weeks. He had very high fevers that fluctuated throughout the day but were controlled with Motrin. Since your child is too young for Motrin, just keep an eye out for it and let your doc know if it gets really high.
Stuff we did:
I made sure DC didn't get dehydrated, which was tough. I fed him often with medicine droppers to keep some fluids in him.
Saline drops/spray and suctioning of the nose once an hour or so, more often if needed. RSV mucus can be really thick and bothersome and the saline helped thin it.
We had to do nebulizer treatments, but with any luck, you'll avoid that.
By the time my son got this, we were no longer cosleeping. I slept in his room, though, to keep an eye on his breathing.
Hope your little one gets better soon. Hang in there.