HELP!

A few weeks ago I started having diarrhea then it stopped. Then last week before bed I started getting really nauseous and sick feeling so I got some water and went to bed, the next morning I started feeling the same way. my appetite hasn't been the same, I mean I can hardly eat a meal a day without almost vomiting but I never do. Only a few people in my house got it but not nearly like I have it.  I have constant diarrhea, nausea w/o vomiting and no appetite. Can someone please help