Not to be glib but I smiled when you said you have 6 children and severe anxiety ...of course you do. :) I feel feel anxiety and I only have 2.
I am not an expert but just a mom like you who shys away from drugs during pregnancy and who has dealt with anxiety off and on. My question to you is are you seeing a therapist? Is the anxiety putting you or someone else in danger? If so (and remember ... anxiety does affect your baby inside), seek a therapist right away if for nothing else than a second opinion.
I suggest seeking a therapist and/or maybe a metaphysical therapist. The more severe the issue, the sooner I'd seek one. The therapist will probably have you consider "What if ..." like "what would happen if" your worst fear happens? And then keep asking you "what if that happened?" to whatever your response is "And what if that happened." And eventually probably ask "and what if you keep living with the anxiety as it is now as you have been, what would happen?" You can do this for yourself in a journal but it's safer and easier with a therapist. They can guide you.
I sometimes foresee the future and worry that my fears are my intuition but I've looked into the Law of Attraction and wonder if I'm bringing it to me. Anyways, it's a "Which comes first, the chicken or the egg" type question we may never know the answer to but I just know logically that if I continue to worry about something that hasn't happened yet, that's not the kind of life I want to live. If anything ever happens, that's when I should respond to it, not before it's happened but emotions are not logical. Emotionally it's not so easy to turn it on and off, which is why I seek out therapy from time to time.
A therapist might be cheaper than drugs too especially if your insurance covers that.
Have you ever considered methods like Anthony Robbins Firewalk experience? I know it sounds hokey but I went to that once because I had to as part of a job and in that experience I found my biggest fear was affecting my entire life and that fear was that something would happen to my husband while we were apart (I didn't have kids at the time). Before I walked across the fire, that fear was consuming me and I wasn't really living life to the fullest because of it. I went around worried all the time and angry whenever he came home late because he'd made me worry. Anyway, after walking the fire, I let go of this fear, released it and my life improved. Granted, my life was not in danger before it but it wasn't the kind of life I wanted continue as I was so I was ready for a change. Anyways, I found my own fears were making me miserable and trusting myself to respond appropriately at the appropriate time (like God forbid if/when something ever happened) would be a better alternative. Walking the fire helped my subconscious get into sync with that.
For me, pregnancy and all the chemical changes inside me during pregnancy also heightened my anxieties from time to time. So keep that in mind as well. A good therapist will consider that too.
And food can have an impact. My doctors recommended staying away from all caffeine and alchohol and sugars and white wheat not just because of the pregnancy but also because of the mood altering affects of these things.
I hope this helps. Good luck and take care of yourself.