If you have both ears blocked after using a sinus rinse treatment, it is recommended to avoid using the sinus rinse for the next few days. Instead, you can try using a nasal decongestant spray like Drixoral or Dristan. It is important to follow the recommended dosage and consult with a pharmacist to ensure compatibility with any other medications you may be taking. Additionally, you can try the valsalva technique to help equalize the pressure in your sinuses. If these methods do not work after three days, it is advisable to consult a doctor for further evaluation.