J.H.
If you have a sinus and ear problem and the antibiotics only work temorary it maybe allergies. Everyone thinks I am crazy when I say this but when my was diagnoses with allergies i thought my dr was crazy because I thought I had a double ear infection, broncitis and maybe strep and she gave me allergy pills and a nasal spray... the next day with just one dose i can not tell you how much better I felt. Good luck and feel better.
J.