As someone who played full time in their youth but didn't get tinitus until much later I can say don't risk your ears. While you might not have any effects now except for short term tinitus, hearing damage is cumlative as well as having catastrophic causes.
Temporary tinitus is that ringing in your ears after a show that goes away in a few hours. It's caused by the nerves in your inner ear getting tweaked and they continue to output that frequency even though no sound is coming though from outside. If the irritation is subtle enough, the ringing will go away, but some damage to the nerve remains. Over time, the nerve becomes irreparably damaged and the ringing persists. Or if you're really lucky, it just stops functioning and you can no longer detect that frequency.
Just about anything you put in your ears to protect them from excessive levels is going to change the sound somewhat. The biggest problem for me is the sound of the snare. It's one thing if the cymbals sound a little dull, or scooped out, but when the body of the snare sound is affected, I find myself concentrating on how I'm hitting it trying to make it sound right.
Some things like the Hearoo plugs suck a fair amount of midrange out and drive me crazy. If the gig isn't too loud, a bit of cotton just sounds a little dull, but I can deal with it. I had some Westone molded plugs made with ER 15 inserts and they also sounded scooped and made it difficult to play.
Then I went to Sensaphonics and had another set of molds made along with both ER9 and ER25 inserts. That made all the difference in the world. Way more comfortable than the Westones, and on a whole different planet in terms of comfort compared to universal things like the Hearoos. I try to play with the ER9 inserts as they sound the most natural to me. The 15s are a bit scooped still but workable and I should use them more often. The 25 inserts are the ticket for concerts and such where you're exposed to insane levels by deaf soundpeople and promoters. But when you're on stage with them, it sounds like the rest of the band is in another room along with your kit. Really disconnecting feeling. Again, I should force myself to get used to this as the 25s sound better to me than the 15s and protect my aging hearing better.
These differences in sound between the various ER inserts are roughly like moving a couple of sliders on an EQ one notch up or down. Not dramatic, but noticable. All are far better than any universal plugs and way, way more comfortable to have in your ears for 3-4 hours a night.
For the $150 or so, less than another used crash cymbal, you can keep your ears around to enjoy all that great gear and technique you develop on it.
Why would you not see an audiologist?