Have sinus infection. on antiobiotics for the last 5 days. both ears blocked. what can i do to unblock ears?

Can take time!: Sinus infections are stubborn, and can take a while to treat. As you've found, your ears may feel blocked, too. Using Normal Saline nose drops can help. Over-the-counter saline sprays are marketed as "simply sinus" or "little noses" - marketed for kids. Guaifeniscen (sold as the brand mucinex) can loosen secretions and make you more comfortable. See your doctor if the ear blockage persists.