Hi Ali,
Tinnitus is unfortunately a side effect of many of the drugs we take for our RSD, of course this doesn't mean you should not have it checked but usually there is not much can be done whilst on the medications.
I find that not putting myself into the situation where I notice the noises is the best way to cope with it.
Going to sleep with some quiet music or having some background noise of some description is helpful.
Please take care
Tayla