unfortunatelly not many of djs are thinking about this problem...or thinking but people don't talk about it to each other.
my advice is to buy professional plug ins...professional plug ins contain special membrane which cut bad frequences that can normally daaged your hearing.
i don't know how much it can cost in states...but probably something between $200-400.it is alot of money but worth to do!!and it works for years...
as for visiting doctor...it would be nice if he check all the ear stuff...(how your pressure in ear works, ear nerve, middle ear...sorry but i'm not sure how to name in english all the stuff inside ear ).
anyway GOOD LUCK and i hope everything will be ok.