Blood test

I've recently been feeling off, just dizzy and tired, also weak. I'm a ballet dancer, and I'm also a vegan. My diet is not something I'm willing to change, I love everything about it. However, in the past couple of months I haven't been eating nutritious food at all. 
The results of my blood work came back and my Vitamin B, Vitamin D, Iron, and Ceratone(?) all came back extremely low. This is a problem, not only because it's unhealthy/dangerous, but because it's affecting my performance as a dancer. It's even affecting my performance in bed, or just living my life. Has anyone else had problems with low Ceratine? Or can anyone help me understand what it is?