3 things make me upset

I'll write about three things that make me upset.
First, I go to university by train, and I must get off at Nigawa. The day, since I was lack of sleep, I slept in the seat of the train and the train passed Nigawa. When I got up, I didn't understand where I am. Since the day, I dicided not to sleep in train.
Second, it happened when I was elementary school student. I stayed at home with my brother. Then we heard a strange sound from the second floor. We thougt it must be ghost. We were so scared of ghost, but we finally decided to see it together. We went upstairs, but nothing was there... However, I didn't like to stay at home alone yet.
Third, it is about my friend. She and I have known since we were junior high school students, but we hadn't met for a long time. One day, I met her by accident. Then I noticed that her stomach was big. So! she became pregnant!! I was surprised and upset, but I became very very happy!! I hope her to have a cheerful child.