you may have had a partial wax impaction but when you added the oil the wax softened and now you have a complete wax impaction. it is very unlikely that you damaged your hearing so assuming that you do not have ear pain or other signs of an ear infection you can lavage (wash) out your ear canal with a gentle stream of warm water (just slightly warmer than your body temperature). the warm water stream will most likely dislodge the softened wax so you can do this in the shower. allow a stream of shower water to go in your ear canal (a hand-held shower works the best). once the water gets out of your ear your hearing should return to its normal level again.
told to use tea tree oil to clean out ear wax was not told to dilute it now it feels clogged. did i damage my hearing?