13 Month old Coughing, Sneezing and Congested?

My little one was put on amoxacillin for an ear infection on Sunday. Now, she is coughing, congested, sneezing and her nose gets runny. Not sure if this is the antibiotic getting rid of all the junk in her system? And what, if anything, I can give her to make her more comfortable. I am using vicks and a humidifier. She has never had a cold... so this is new to me!! Thanks!!