Hi there, thank you for posting your query on healthcare magic. An enlarged adenoid causes a variety of symptoms like 1.blocked nasal and sinus passages, 2.mouth breathing 3.chronic headache 4.reduced hearing 5.pressure with the ears as if eustachian tubes seem blocked 6.sinus congestion 7.post nasal drip Since you have a history of enlarged adenoid, it is very likely that it has grown bigger and thus causing all these symptoms.People with enlarged adenoids do not get proper sleep at night because it causes breathing obstruction even though they do not realize it, this makes them breathe through their mouth at night.Due to the frequent breathing obstruction at night, people wake up with headaches almost regularly. Secondly, because of the excess mucous in your sinuses, there is dripping of this mucous down the back of your throat which tends to pool around the pharynx and often leads to pharyngitis hence the chronic sore throat. Since you have been clinically examined and the doctors did not find anythingelse, your symptoms are most likely attributed to the enlarged adenoid. Now, you can get medications like steroids to reduce that in size but it will keep growing back with exposure to cold and allergens.Preferably for you, surgery to remove the adenoid is the best line of treatment. Hopefully this helps with your case. Thank you for visiting healthcare magic.