Hi there,  
So 2 hours ago I started to panic and stress out really badly on an essay that I'm currently doing for school, it started because I was struggling with writing it, so was really small but over time I felt more and more stressed even when trying to calm down by doing breathing exercises.   
This lasted for around an hour. And I was so on edge that I ended up completely bursting into tears. I have had stress before but have never felt so out of control and tense. My mind was racing and going a million miles an hour and I couldn't think straight. Also I was very overwhelmed too and tried listening to music to calm me down but it just made me even more stressed.   
I didnt have any physical symptoms other than crying my eyes out for like 10 minutes.  
If anyone would like to explain what this was, that would be great. Thank you.