Looks like you are developing an inflammation in the ear due to upper respiratory tract infection.. if you are having persistent cough with sputum you will need to be examined in detail..
Next Steps
For relief of ear symptoms you can take an antihistaminic
T. Montelulast+ levocetrizine one in the night for 5 days ..
If the patient is not on any medications for controlling blood pressure then can use
Oxymetazoline nasal drops 3 drops thrice a day for 5 days and then stop .( Important to stop after 5 days )
Along this T. Paracetamol 500mg can be taken when you have excessive pain..
Health Tips
steam inhalation
avoid cold food products
if developing fever or bodyache then get an RT PCR done for COVID
REVIEW IF SYMPTOMS PERSIST FOR MORE THAN 3 DAYS