I Am Always Tired Though I Sleep Enough, It Takes

I am always tired though I sleep enough, It takes all my effort not to fall asleep in school. Ive been getting random intense hunger craves,and my weight has been fluctuating slightly. I have been having quite frequent yeast infections, and my urine smells strange. When I dont eat for a while i get shaky and my stomach and thighs itch. Most recently I have been having numb finger tips once in while. I also have extremely painful periods,(vomitting, diarrhea, extreme fatigue and pain)