large amounts of B12 can make you hyper, it happened to me, i think it was T4 converting to T3 more efficiently, and it can give you proper hyperthyroid symptoms. 100mg wouldnt touch you if you are low, more like 500-1000mg sublingualy might do it, or injections.
Diane, your symptoms are all in the Andy cutler book,its your hormones being messed up,adrenal/thyroid, i think nicola mentioned this.
im suffering with this at he moment,im on support but i had to cut down on thyroid treatment, so now all my hormones are all over the place.
Dawn.