Paranoia or Frustration?

Frustrated or paranoid? What is the difference anyway? Oh well, my friend has this really serious problem about his character, he gets too worried about bad things too much and took a long time, a seriously long long time, before he gets over it. Well, I think I should give an example.
Yesterday, in school, he was fumbling through his wallet when he went,"Huh? Where is my other two dollars?" and asked what happened. After explaining all the sums of money spent so far, he said he was missing two dollars and his calculations were correct. Just then, I said he dropped them and it was going to be okay, trying to calm him down.
He went totally berserk.
"What I am going to do? I am so doomed!", he shrieked and this went on and on for a few minutes or maybe at least fifteen mintues until I could not even concentrate in class. Finally, he cooled down and I heave a sigh of relief, "Phew!" So, frustration? Maybe. Paranoia? Plausible.Next one happened to me. Don't worry, mine isn't that bad. Same place, same day. I forgot to refill my green pen again and again. How am I supposed to do corrections fast and quickly as the teacher said out the answer? Lend from a friend? Must wait till he writes finish which is like when the teacher finished saying the answer. Helplessness was indeed the feeling I had at that moment. I was like, "Quick! Quick!"
I had butterflies in my stomach.
What if my teacher saw me not jotting down anything? That's going to be a really bad scenario. Really bad. I was trying to write as fast as I could to return it to my friend and catch up with the teacher until everytime I write a letter, just a letter, my fingers goes into "pain mode" and I feel a short tingling sensation. Sounds okay, in your dreams! It got worse and worse. Until finally, Lesson ended and my whole arm nearly went completely numb. This has to be paranoia. The fear in me was pricking me continuously and let me tell you, it did not feel good.
For today, it got worst. Totally. First of all, I woke up fifteen minutes later than usual. That's bad. I rushed through my daily routines and finally got out of the house. Then, after sprinting to the bus-stop, I sat and waited, and waited, and waited. And here it comes, my bus! Yes! But there's a twist. It was packed with commuters till the driver could not even open the door.
It felt like someone just slapped me in my face.
It was unexpected. Just then, I decided to take a longer alternative without a choice. And I zoomed to school so fast that I only had time to think about reaching there on time and before I know it, I arrived. Phew.... This was paranoia. No, it was frustration too. Or could it be both?

This is extremely confusing and I guess I should stop racking my brain and scratching my head before I feel both frustrated and paranoid...