I sneeze a lot lately, itchy eyes, runny nose. i have untreated sleep apnea (extremely big tonsils) and woke up today with my tonsils feeling swollen, back of throat feels itchy, nasal drip . no fever. neg covid. tea and gargling helps. what is it?

You have two issues, obstructive sleep apnea related to large tonsils and ongoing allergy/seasonal allergy. Quite likely, you need to have your tonsils taken out to relieve obstructive apnea to avoid of developing pulmonary hypertension. Your allergy issue can be curtailed by using daily fluticasone (Flonase) nasal spray along with daily long acting antihistamine, e.g., cetirizine (Zyrtec).