Due to upper respiratory tract infections, a lot of patients end up having an episode of acute otitis media....which causes severe ear pain...but it usually settles down with medication and antibiotics but the fluid stays back in the middle ear causing a feeling of persistent blockage and muffled sounds in the ear. This condition is called 'Serous otitis media'. It can be confirmed by checking your ear drum by an ENT specialist.
Next Steps
1) Get checked by an ENT specialist.
2) Continue nasal drops and decongestant medication