first of don't think about leakage at all, it seems to be a case of paranasal sinusitis
, get a plain X ray of your head and face region in caldwel luc view and water's view, consult an ent surgeon for further diagnosis, till then you can take some antibiotic like levofloxacin
500 mg OD for 7 days, levocetrizine OD,sinarest
inhalation thrice a day, mucolytic
like brmohexene and also get tonsil examined by the ent surgeon.
thankyou for consulting HCM.