My appendix burst a year ago and ever since I ve had all sorts of issues. My main one is extreme and rapid weight gain. I ve had my thyroid and blood sugar tested and all are normal. I ve developed food allergies to gluten, dairy and nuts. I get severely exhausted no matter how much I sleep, I rarely have bowel movements, i get this weird head pressure sensation consistently, muscle weakness, or it feels like my nerves are going hay wire. I get abdominal pain and lots of bloating. I can t lose weight no matter how I eat or how much i exercise and sleep.