B complex can make you worse if one of your bs are severely out. I had this problem and did hair analysis with Bionetics in UK and found I was only deficient in B1 and manganese. Now so much better after 3 weeks of B1 and continuing manganese. Molybd is ok now and again but can poison you if take daily. Although zinc lowers copper it can cause symptoms along the way especially if you don't lack it. Also try Chinese herbal tinctures like licorice, dong quai and astragalus and a few drops each day so not too much of a hit like capsules and you can build up gradually. Your blood pressure is probably dropping too low with the b vits so makes you feel like your fading away!

Have some sort of hair analysis or bioenergy testing as everyone different with AF and copper probs - I read B5 was the best to take but it just lowered my B1 more so made me much worse.

Good luck and keep focused to defeat this, your mind will help you more than you realise.

Jo