there must be sinusitis in your case the post nasal drip of sinuses behave like this when the thick discharge falls back it cause oar lymph nodes and eustachian tube blockage leading to clogging in ear,incidentaly doxi ou were taking for acne cleared your infection as doxicycline clears the sinuses also but for clearing eustachean tube and back of throat you add alegra 120 mg bd syp piriton 1/2 tsf night syp glusil 1 tsf bd put nasivion nasal drops to clear back of throat and eustachian tube it will take 3 week to come t normal you can also do valsulva exercise to clear the eustachian tube