Would you be concerned

My daughter been sick lately, runny nose a small cough durning the day. She is 13 month old, and since we all have a cold, I’m think that’s what she has.. anyways she normally wakes up at 4-5am to be changed and cuddle the rest of the night at up by 8am for a bottle of milk and breakfast. Anyways she didn’t want wake up at in the middle of the night like normal, she is still sleeping at 8:33am. She now coughing in her sleep.. should I wake her up or just let her be? I’m thinking I’m gonna take her in, because her brother’s cousin(his daddy’s family) has RSV and was around him, and no one told me that he had it until I seen a Facebook post about it..