I Am Trying To Find Out Why I Have Extreme

I am trying to find out why I have extreme fatigue. I was found to have low vit D for the second time. I have multiple body aches that change where they are day by day. I have had sx of colitis but they have not actually dx'd me with a type of colitis. I have had IBS-C for years. Slow metabolism and difficulty with my weight. Anxiety and depression. I am tired of no answers and ongoing sx.