I was OK for few weeks -- dropping weight, sport etc. Previously I couldn t sleep well. Now the insomnia is back. The only event in between the 2 states -- gastroenteritis, probably viral. But there are no signs of lack of B12. Well, also some troubles, but probably exaggerates by me. I had suicidal intent, it was after some antidepresant, which make just the opposite it was supposed to do, so I´m very troubled about my state.