Horrible nausea! help ?!?

I experience nausea alnlst everyday! I have bad anxiety but I don't think its that. I yawn a lot and I get so nauseous, I feel like barfing. I'm seeing a councelor and I already went to the doctor and they didn't find anything wrong. Help? P.s. I can't even eat because I'm so nauseous. I can't think,smell or look at food because it nauseates me so much. I have a HUGE fear of vomitting :( I'm not pregnant either. I'm only 14