For The Past Few Days I Have Been Waking Up

For the past few days I have been waking up between 4-6am feeling extremely sick. I haven't yet thrown up, but I wouldn't be surprised if I did. The next problem is that Im having eating problems. Im an entirely hungry. starving even. I walk out to go get food, but looking at food does nothing but make me feel sick. Ill go the whole day with eating only a couple bites (if that) of something. Ive suffered with eating disorders in the past and I wonder could that possibly be my body doing what it was taught over so many years, or is it something else?