@Poppy67 I know it's hard, but just try to relax. Put on some music or look for "white noite" sounds to study and take your mind out of Tinnitus. I wish someone told me that when I first experienced it: The more you freak out, the worse you're making yourself.
I agree with Zug. I know many cases (including myself) who got the worst 3 months after T emergence. Because we got scared, after T emergence we started to monitor its level every minute and got pessimistic.
Positivity thinking is crucial, take Zug advice and mask it with music.
I prepared for all my exams while playing music although I didn't have T at the time.
You can say that your T became chronic only after 18 months, during all this time chances that the will go away are very high. I talked directly with people who got cured of T even after years.
The most important thing now is not to pay attention to T. I know how difficult this is. I wasn'the able, ,yes, but that is the best advice.
You have exams now, you don'the have time for this shit now.
Don't give importance to T.
People who, after getting T, continued their lives like they never got it, are doing the best.
Do not stop your life to listen to your T.
Continue your life as a student and as a youngster.
If T is from loud noise, just protect your ears with earplugs when you are in loud music/noise environments, so you don't damage your ears further.
If you can't control your anxiety and T is very loud, you can ask your doctor to prescribe you Clonazepam (Rivotril in Europe, and Klonopin in Us), as it reduces T and anxiety and has also sedative effects. But there is a big downside: clonazepam is addictive, one you start using it, it's hard to get off it. You can only do that tapering down very slowly, probably replacing it with Diazepam/Valium. So there is this addiction risk associated with this benzodiazepine, Clonazepam.