Firstly - please refrain from using cotton buds in your ears - the ear cleans itself and trying to do it ourselves, we do far more harm than good.
I would recommend seeing an Ear, Nose and Throat Specialist, rather than just leaving it. As you have stated in your posting, this problem has been going on for a while and it is not sorting itself out. Rather have it seen to.
Please feel free to let me know if you have any further questions
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