I just think its your body healing from surgery, everyone heals differently and maybe you went back to school or work to soon. Also, the exhaustion is because you are not eating the same anymore so its only natural that you will feel that way, but you should trying taking the chewable multi vitamins and calcium. It took me about 4 weeks to go back to school and work because I was in alot of pain, but I do have a low tolerance for pain. Just try to take it easy and don't over do it, your body needs time to heal and adjust to the band. But if you notice any changes to your wounds/ incisions, then you should talk to your doctor incase of an infection. Good luck!