Do I have anxiety?

I really don't want to claim anything that isn't true. There's a lot of people in my school who fake mental illnesses and I don't want to be one of those people. So, here's my story:

So pretty much for the past three years I've always felt anxious. Nail bitting, heart racing, nauseous, uncontrollable worrying. I'm pretty sure it's an anxiety attack but I'm not sure.

But for the last week it's gotten worse. Ive been shaking. Actually shaking. My heart feels like it's going to pop out of my chest. I usually feel like I'm going to vomit and pass out. It hurts so bad. I just don't know what to do anymore.