Her opinion of you playing favorites is subjective, as long as there haven't been other instances or other people who also think you "play favorites" you should be fine even if she does report it because it will be unfounded. As for the med administration, as long as there was no adverse outcome for the patient, there should be no reason for her to be fired or lose her license. I agree with one of the previous posters, I think something has already got her on edge and shes taking it out on you