Hi Teri,
I just answered you most recent question about diet, before I saw this. Your headaches are most likely a result of dehydration and not being able to keep food (and subsequently water) in your system. That is most likely also the reason you are feeling so exhausted. When your food is passing through your system so rapidly, your body does not have time to absorb the necessary nutrients your body uses for energy.
The ana test (Antinuclear antibody test) is a way to test for certain diseases, like autoimmune diseases (such as IBD). Positive test results indicate that your body has a higher than normal level of antibodies indicating the presence of disease.
I hope this helps answer some of your questions.