Hi welcome to Health care magic forum.
Thanks for calling H.C.M.
So far i understand you had some or other discomfert in the ear after diving and it is subsiding automatically by its own. It is suggestive of sudden closure of the eustachian tube due to difference of the pressure , inside and out side of the middle ear.
It is always preferable to consult an E.N.T.surgeon for clarification of doubts and to exclude any damage to the ear. And to have some hints to avoid the injury
to the ear. It is necessory to keep the mouth closed during the process.
Wishing for a quick recovery , and no recurrance.