You won't ever get 'used' to it, since as the previous posters have described, it is necessary to equalise air pressure either side of your eardrums as the cabin pressure changes with Climb & Descent.
Free advice: Never never ever fly with a cold, or if you cannot clear your ears - I know several crew, all within a relativly small company who have been permanently invalided from flying duties due to damaged eardrums from doing so. Even if you only have bit of a cold, what happens in an uncontained decompression? Rather than a serious but survivable incident, you lose you licence, career and hobby.
Fly safe y'all
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...proceeding below Decision Height with CAUTION...