Sickness

My 2 year old was diagnosed with RSV last Saturday and now my 2 almost 3 month old baby is sick and I'm pretty sure it's RSV. I took her to the doctor Wednesday and they said just look at her breathing and watch for a temp. She's got a horrible cough and she's so stuffy. I've tired to suck out her nose but nothing is coming out even when I use the little drops for her nose. She's super whiny and this has been going on since Tuesday and it's only getting worse. So far I haven't noticed anything different with her breathing and I hope it doesn't change. I just can't wait for this to be over with.