Melody you have such a good mindset. Reminds me of the quote my pain doc says On the better days do the most you can and on the bad days do the best you can.
Anyhow I remember reading that b12 supplements can in some cause the anxious/heart racing but who knows because probably tylenol even says that. You know how the labels state basically everything.
As someone who does have bad anxiety sometimes I just have the feeling your friend is stating and can't put my finger on why. Nothing changed just some inner something.