What are the symptoms of anxiety

Do I have anxiety? Sometimes if I'm leaving my house for no apparent reason my heart will just start racing and I'll feel like I'm nervous about something even though I have nothing to be nervous of! Also I get angry like super easy. For example, I'll be driving and if someone does something I think was rude or dangerous I can literally feel my blood boiling and one time I actually had to pull over because my hands were shaking and I knew I had to calm down. It felt like my body got real warm and my heart was beating hard and fast and I just felt nervous or something idk. Is that what anxiety feels like?