My depression didn't respond well to five SSRIs, one SNRI, two tricyclics and one tetracyclic. It turns out I didn't have major depressive disorder, but bipolar 2. The only medication that worked to alleviate my depression was Lamictal (lamotrigine). It also caused no side effects at all.
There are a few other medications that can be safely added to SSRIs, if you're not getting enough benefit from them. Lamictal is one of them. Buspar (buspirone) can also be added to help with anxiety. It's neither an SSRI (doesn't seem to work for you) nor a benzodiazepine (addiction potential), so perhaps it's worth a try.
But talk with your doctor, because I don't know your particular disorder or medication history.
There are a few other medications that can be safely added to SSRIs, if you're not getting enough benefit from them. Lamictal is one of them. Buspar (buspirone) can also be added to help with anxiety. It's neither an SSRI (doesn't seem to work for you) nor a benzodiazepine (addiction potential), so perhaps it's worth a try.
But talk with your doctor, because I don't know your particular disorder or medication history.