How do I calm myself down after almost getting hit by a car?

Okay so I was walking home and I have to cross this street and for some reason crossing that street always makes me super nervous I just hate crossing streets. Anyways I get there and I wait for all the cars stop weLL I THOUGHT all of them stopped and this car came out of nowhere so I just jumped back onto the sidewalk but this lady in her car stopped and told me to cross and thats what actually did. It was a **** ton of cars passing and I was really just running through traffic like the dumbass I am. I almost got hit so many times and people were honking and yelling at me. I really wanted to cry beacuse idk what the **** I was doing :c it really took everything in me not to cry all the way home. My legs were shaking really bad and I couldn't breathe I was just speed walking and hyperventilating the rest of the way to my complex.Everytime I think about it I tear up and I feel like I can't breathe.