Why do I get chest pain and rapid breathing after eating carbs but have arm and leg pains when I am hungry? I am reactive hypoglycemic and anemic. When i eat carbs my body gets puffy, especially my stomach. I get night sweats, am constantly tired, have a tightness feeling in my chest, and am weak. I have seen so many doctors and can't figure this out. I am a 14 year old girl and have gained weight.