It's important to slowly taper off benzos if you've been on them long enough to develop dependance (longer than two weeks). Your pdoc probably prescribed an increase due to the fear you've described. I'm with Loop on benzos being a plague. Benzo tolerance and dependance are poorly studied let alone how these conditions can affect a patient's long-term mental health.

Apathy, depression, and depersonalization are all things I've experienced. I'm starting to improve, closer to being able to feel. What I've done to do this is: a whole foods gluten free diet with less than 50g of refined sugar per day and no artificial sweeteners, daily exercise, reducing my medications to just Lamotrigine and Vyvanse, taking a multi-vitamin/mineral, Withania Somnifera (used in Indian medicine), L-Theanine, being mentally engaged in something (I read a lot), and the time necessary for Neuroplasticity to repair the damage done by medications and lifestyle choices.

It's been hard, especially because of the benzo withdrawal I'm in, but it seems to be working. I do know that psychiatry doesn't have all the answers, at least, not in the form of pharmaceutical medications.