Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complainit seems that due to sever cold there has been infection in ear too that has lead to fluid accumulation in ear as well as tinnitus or ringing in ears is also due to it..
Nothing to worry as the symptoms will gradually improve once the infection will subside..
As of now you can take a course of antibiotics like
Azithromycin, anti-inflammatory painkiller like
Ibuprofen, anti allergics like
Benadryl, decongestants like
Phenylephrine, mucolytics like Ambroxol, nasal decongestant spray containing
Xylometazoline and also do steam inhalations and saline nasal irrigations..
Avoid spicy and chilled foods and drink plenty of warm water..
Avoid popping the ears to prevent trauma to eardrum..
In case if after the cold subsides the tinnitus and echoing in ears does not subside consult an Otolaryngologist and get evaluated..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.