What is this called exactly?

Today we had a picnic at school and I was walking through a field with my friends. I have a deathly fear of bugs and as we were walking a fish fly landed on my pants. I started running in circles, screaming "It's on me! It's on me" repeatedly (I now have a sore throat). I was also crying and it felt like I couldn't breathe. It took a while for my breathing to get back to normal after this happened. I was just wondering what this is called if there is a name for it at all and could it happen again...