Strange things on my stool, could you help me please?

Hi, I have a little problem with my stool. There are white/grey stuffs, (similiar to dust) on it. (was asking myself why there is dust in my body?) I can't figure out what is my problem. I feel very tired everyday, I have no strenght, and low bloody pressure. I feel better after eating foods with sugar. I also have dry skin under my beard and under my hair. 

Hope you can help me, sorry for my English. Thanks!