I think I have anxiety

I never knew what anxiety was. When I was younger the doctors had asked me if I had anxiety and I said no. Someone asked me rn if i deeply fear something and I just realized I fear a lot. Could this be anxiety?

With fearing a lot, I mean this..

-in any case, I immediately think of the worst things that could happen (even in something not scary)

For example/ I could be preparing for a speech & I’ll start imagining scenarios of myself slipping

I could be driving and I’ll imagine myself running someone over or getting into a car accident

I could be holding a knife & I’ll imagine accidentally stabbing myself or someone..

Is this anxiety or just paranoia ?