Hi , in my opinion you have eustachian catarrh, causing ear blocked sensation with reduced hearing.
I would suggest you to continue your decongestant with antihistamine for medicine another 5 days.
Do steam inhalation, use decongestant drops for your nose thrice daily.
Do valsalve exercise tovopen up the tube.
I would suggest you to get the tympanometry
test done to detect middle ear status and eustachian tube function.
Depending on the report , and if your ear block sensation persist for more than 7 days then you can get grommet insertion done .