I feel light headed when i stand or walk around. bit shaky. could it be from the c. diff? have lost some weight. just feel mind not all there. anxiety

Both: Either is possible. Diarrhea can create dehydration and electrolyte imbalances, and the anxiety induced by having a severe form of colitis can be somewhat overwhelming. You might discuss this with the doctor treating your cl. Difficile, and consider seeing a psychiatrist or clinical psychologist about the stress and anxiety. Good luck and get better.