For the past week I haven't really been hungry or thirsty.. I'll force myself to eat a couple bites but then start getting really nauseous to the point i need to lay down.. the other day I was so dehydrated I had some water and almost threw it up.. When I eat and drink all I want to do is puke and I'm sick of it I'm nauseous a lot it hits me all the time everyday.. what's wrong with me?