I switched from 100mcg Levo to 1 grain of Nature-Throid 7 days ago and within a few days I noticed the difference for the better. After a week however, I'm beginning to tire out from mid morning onwards (I take my dose on waking). Is it too early to up by half a grain? I'm thinking that as my Total T3 level was low (Result 1.2 (range 1.3 - 3.1)) I could give it a go. Any advice would be gratefully received !