T can come from many reasons. It may be the injury, of the stress/trauma from the accident, or whatever. Mine came out of the blue a few years back. The only thing I could think of was fixing a bad smoke alarm w/o earplugs a month before that, of a plane ride a week before that night when I woke up with super loud and ultra high pitch dog whistle T. It was an unbearable alien sensation. I had to sleep right by the shower on a foldable cot. Then as it wasn't bad enough, severe hyperacusis hit which turned all normal sounds glassy and piercingly hurtful to the senses. So many of us had been where you are. But over time and with some good advice here or with some treatments, many do recover to live a normal life. Read up the success stories to get some hope and some insights how to cope. The initial stage is the hardest phase of T. Give it time. If needed, get some masking going. Youtube has some tinnitus masking sounds (search it). If you have smart phone, there are free APPs to generate sound. On PC, I use 'aire freshener' as a free sound generator with many sounds to choose from. If you are too anxious or depressed, you may want to ask your doctor to give you some prescriptions for anxiety and depression, or even sleeping meds if you have trouble sleeping with the T. Take care & God bless.