Mystery Diagnosis

So, something CRAZY is going on. I am sick ALL the time. Anything with any odor makes me want to....well you know. I want to eat all the time, you may not think that unusual as much as I enjoy eating, but now it takes me a year to decide what tastes good, if it should be cold or hot, to dip or not to dip.....and on and on until finally I make something only to find out it smells funny and I'm not eating it. Besides all that, my favorite jeans will not even zip up!! Did I mention if I sit down I fall asleep? What is going on?