I Am Having Vitamin B12 Deficiency. I Am Feeling Tierd,

I am having vitamin B12 deficiency. I am feeling tierd, weakness, short of breath, dullness. I am taking nuerobion for Vitamin B12 deficiency. I am also taking valis 80mg for my BP. I was having fever since yesterday, now its reduced, but having chillness in the body. I am taking low fat diary items like yoghurt, milk, soya milk, green leafy vegetables, almonds etc. My BP is also varying due to this.
Any particular remedy for shortness of breath.