After doing a quick look, Zoloft is not listed as an interaction with
Klonopin, so you may ask your Doc about trying a different anxiety med to avoid an
interaction with your Zoloft, or switch the Zoloft to something that works with the Ativan if the Ativan works well for your Anxiety. Like I said above, I would start by trying to find a new Doctor, though.
I hope this helps somewhat, sorry for being so long winded. Good luck and keep us posted!