Zissou - you need to relax, take a holiday if necessary. The various tissues around the ear can affect the perceived amplitude of tinnitus massively. The exact mechanisms for this are open to debate, but their effect isn't. The problem you now have is that your 'tuning dial' is set right in the middle of the tinnitus frequency. You need to employ some TRT (try Google for info) techniques.
Cruelly, the more you focus on the tinnitus, the more difficult it will be to 'detune'. You may well have aggravated tissue around the middle + inner ear, and it could take time to settle - giving you an increase in tinnitus volume. Regardless, you need to spend the next few days distracting your attention from the tinnitus. Spend some time around the family's kids, go out to lectures, theatres etc - do anything you can to focus away from the T.
Forget about 'deformation' of the cochlea etc - it doesn't bear consideration. This looks like a middle ear pressure issue. Note that there are many mechanisms to equalise your ETs - the valsalva is not one I personally recommend. There are several muscles that can do the same task, with fewer risks.
Your only option is to relax and take time out, making sure to distract your attention from the T. Over time things will go back to how they were.
As always - if in doubt, CONSULT A PRO OTONEUROLOGIST