Tinnitus isn't a disease or injury - it is a symptom of the damage.
The reason this is important is high frequency hearing loss is the underlying cause of almost all tinnitus.
The high freq loss will affect you in life quite badly and is permanent in most cases, and in all cases if due to repeated exposure to loud noise.
High freq hearing loss will affect your ability to hear almost any conversation if the is significant background noise, ie a party.
You sound like you are in the early phase and if you stop exposure to damaging noise (I-pod, etc) it should not progress.
Aircraft are noisy. No problem but you must in your situation buy a good set of Headphones.
If you don't stop exposure you will live to regret it. I did/do!
I am a surgeon and Av Med qualified so I do have some knowledge.
John