Whaa?! Your doctor is nuts in saying that you should go to a loud venue without ear protection. That's unthinkably bad advice. Going to loud venues with ear protection, on the other hand, is reasonably safe under specific circumstances (earplugs alone are no good for clubs or heavy bass venues, however, avoid those places for sure).
I agree with Jkph75 that you should obtain your audiogram, and look and see if there are small dips the lows or the highs. Many ENT's will be quick to say 'normal' as long as your hearing does not drop below the 30 db line, which is really not accurate (because by then you are hearing impaired in a given frequency, and if that happened across the board you would need a hearing aid, and you can start running into problems long before that). I'd say 15 db and below at a young age, for any frequency, means that something is not quite right, whether it be from noise damage or something else. Hydrops can also affect either end of your hearing, and secondary hydrops (the one caused by ear trauma, not occurring by itself) can present exclusively as high frequency loss from what I've read.
I'm also curious as to how your ENT came to that conclusion, as all the symptoms you have described can come from noise damage exclusively. Usually it takes a great deal of trauma for a noise injury (or some other type of traumatic damage) to turn the condition into secondary hydrops (like you'd have to be in the military, with explosions, or play in a heavy metal band). Perhaps you have had enough loud noise exposure for a mild condition to develop, and that you may be in the very early stages of something. I would think to wait for the results of an Ecog test if your ENT is able to provide one, however, and to review your audiogram yourself. The Ecog is a slightly more useful diagnostic tool for Meniere's or hydrops. Don't exactly remember how it works because I have avoided getting one (too loud).
