I have BP II, Major Depressive Disorder, and Anxiety and Panic Disorder as well. I am on Lamictal, as a mood stablizer, but it helped (it took a while to get to theraputic dose though)almost completely stop my anxiety going into full blown panic. Also, I have been learning about Bipolar II being closely related to Anxiety...the "wired but tired" (hypomanic/rapid cycling) experience as appose to the Euphoric Mania in Bipolar I. I am reading a book on Bipolar called "The Bipolar Disorder Survival Guide" by David J. Miklowitz, PhD. It's been a tremendous help (3/4 of the way done). There are different ways to treat anxiety/panic with those of us that suffer from Bipolar as well. When you said..."kinda like a low level super anxious feeling that's 24/7"...a bell went off in my head. That's the Hypomania- "tired but wired" thing we experience with II. I suggest getting the book, maybe it would help.
Anxiety/Panic is AWFUL; I wish you the best. Perhaps realizing that the anxiety is part of the Bipolar II might help in the way you go about helping yourself or getting help. Maybe it neeRAB to be discussed with your Psychiatrist and treated as a increase in hypomanic symptoms and maybe an increase of your mood stablizer or change in meRAB is in order. Hope this might help.
-Bella