Can Lidocaine And Motrin Be Taken For Severe Ear Pain?

My 7 (soon to be 8) year old son has been having severe ear pain for the 3rd day in a row. We have been in Mexico for the past week and he has done a lot of swimming in the ocean and also the swimming pool at the hotel. I went to the pharmacia and the gave me drops with hydocortizone (10 mg), lidocaine (50 mg) and told me 2 drops every 6 hours. I have done as directed for my son, along with motrin every 4-6 hours for over 48 hours and he is still in a lot of pain. I noticed some dried bloody discharge from this ear. We are supposed to get on the plane in leas than 12 hours to head back home to the US and I am concerned about him getting on the plane. I intend to taking him to the doctor once we get home, is there anything else I should be doing to try to ease his pain? Is this an emergency situation?