I've used the chinese herbs for AF, but I have high cortisol so you've got to be sure that the herbs you take are right for your AF. My mom has a combo low and high and she had a bad reaction with the chinese herbs I gave her to try. She needs to take isocort during the low periods and phosphidityl serine during the high periods. I'm not sure about korean ginseng, but siberian ginseng was recommended to me.
Hawthorne berries help me when my heart starts pounding. Now that I'm better it doesn't happen every day. Magnesium helps too. Keep taking the vitamin C and add the unprocessed salt as well as isocort. I think Dr. Rind talks about isocort on his site. But you need to be off of any adrenal support before you take the saliva test. If you find out that your numbers are really low, then going on cortef will be better than trying OTC stuff, according to some folks on the NaturalThyroidHormoneAdrenals group on yahoo. Once you get your labs post them on that group and you'll get them interpreted and some guidance on how to treat it. It will get better. I know of one woman who was really bad off, she had anxiety, rages, pounding heart, low blood sugar, all the horrible symptoms of moderate to severe AF. She got on cortef and slowly got better to the point she was able to address her hypothyroidism.
Try to be easy on yourself and not get too frustrated. It'll only stress your adrenals even more. Don't worry about the cortef (hydrocortisone) causing bad side effects. The dosage you'll be on (if you need it) will be a physiological dose to replace what your body should be making. It will take the stress off the adrenals and allow them to recover.
Once your adrenals are supported, you can start supporting the thyroid more. You need iodine, selenium and tyrosine to help the thyroid. I don't know if starting Iodine right away would be a good idea or not. Your adrenals might not be able to handle it. Once you get your test results, you'll have a better idea. It's very possible that once your adrenals are on the mend, all you'll need is to provide your thyroid with the necessary building blocks to manufacture the thyroid hormones itself and not need thyroid hormone.