@Blero, I'm afraid that you gave the answer. If you listened to sth very often, as I guess, with a headset having had T already you might have made your damage more advanced . It's cumulative. The fact that before nothing happened doesn't mean anything. Nothing will happen 100 times and it will be 101 when sth will change. Mind that even undetectable hearing loss may be enough to trigger T, it's all relative. Going to clubs with earplugs is cool, as long as you don't open your mounth
otherwise there is the occlussion effect ( check the thread on TT about this ) . Sleeping bad from time to time could not cause it. I 'd slept like shit the whole year before T so I might evetually suspect there's a connection between this and my current state, but not your one night and job interview stress. This is not enough. Otherwise the whole humanity would be mental. I'd say you can blame yuor headset and clubbing. Spikes can last as long as a few weeks or even months. There are people here who are the proof. What's important now for you is to give your ears ultimate rest until you notice any improvement. You may try a doc and a course of prednisone. You may try NAC , magnesium, vitamins B, but all this works better when administered asap. Writing this I'm watching my bf who's got T and hearing loss with his headset playing a video game and I feel like asking 'what's wrong with you guys ?'