Anxiety? i feel awful ! can someone help me feel better?

Okay , so today I feel disgusting . I felt like I was about to throw up any minute. I was clenching my teeth and I had a headache. I have an enormous fear of gagging/throwing up, so that made me even more anxious. My mom has to leave tomorrow night to go to California which is a couple states away from where I live, and I hate being without her because she is the one who understands my anxiety and helps the most. I'm only 14 and I'm not sure if all of this and the feelings (nausea,headache,ect) were from my anxiety.. is it? How can I relax and know I'm ok? I hate feeling sick:(