Idk, but do you think you're suppose to get a buzz? Because you're not, that's how benzo's work, it's doing it's job, never take more then prescribed because a little more and you will always need to take more. That's the caveat of benzo's, and don't forget it (never take more). You're not feeling it like you did because you're at a therapeutic level, don't worry about being hooked, (if it's really Rx'd to you), don't expect a buzz, if you don't think it's working tell your doctor, so that he can put you on something else that will.
Maybe you can ask about
BuSpar. Be careful, a benzo addiction is among the worst.