Should I relax?

A classmate had lost her mind and made a scene in the school. I heard that she has some serious problems which I do not know. Perhaps she was under the heavy pressure. But there is nothing I can help but to pray for her. I'm worrying about another friend who seems to be troubled by some problems over a long period of time. From those situations, my instinct is telling me that I should relax as I do feel the intense pressure of the school and life this time. But I have been training for the competitions. And I would be fine as the Lord is with me all the time.