am Dr Sriram nathan and i Shall try to help you out with your problem.
You seem to have blocked your drum or canal when you took the shower.
You definitely need to get the drum examined by an ENT with an instrument called the otoscope
for correct diagnosis.
It could be due to many causes ranging from effusion, to eustachian tube dysfunction
to an infection to name a few. It could also be a plain wax which has lodged inside.
But do not worry and do these:
-take a course of antibiotic like amox-clav and anti histamine
like levocetrizine in consultation with your doctor
-get an friend to check the ear with a torch and look out for any obvious thing which is blocking the ear.
-Do not take head bath for two weeks and after that do not allow any water to enter the ear
-Do not put any other ear drops
-If the pain is more then you may consider taking injectable medications for better and faster symptom control.
Remember that if you keep your ears clean and dry the block will recover
In any case if you do not get better within a week then you must get your drums and canal examined by an ENT with otoscope and get back to me with the report.
If any other doubts get back to me
Dr Sriram Nathan