What's wrong with me?

So last time I ate was 11 or 12 yesterday morning. I went to a concert last night and was nervous but that was normal. My stomach started to hurt from anxiety but again. Normal for me. So I went to the concer and stomach still hurts and the car ride home was horrible. Not normal. I usually would have been fine but I got so car sick and felt like I was gonna throw up the whole time. Got home and stomach still hurting so I thought maybe I'm still having anxiety about the concert (my first concert). I tried eating but everything sounded revolting and made me wanna throw up. So I had some oyster crackers and stayed up really late with friend (stomach hurting all night). But now it's the next morning. My stomach is still hurting and I can't eat without wanting to throw it up. Anyone know what's wrong?