I honestly don't know what kind of answer to give to your post. Your situation is kinda complicate and first of all I would encourage you to seek some medical help for your abdominal symptoms. I STRONGLY doubt it will be something bad OR that you are going to die... but still that's what I would do.
As for weight loss, that's fixable. You need to start looking for some motivation inside of you to start eating healthy and exercising. You can find lots of info in this forum; it has helped me both to understand more of "this weight business" (!) and to keep me going.
We are here to help and get help, so please feel free to ask whatever question you may have =)
And good luck!!