history: I have a big certification test coming up for my job. I studied so much but am still nervous I won't do good. I am so nervous about the certification test I have to take for my job. I am worried I won't pass it.
current: It must be nerve wrecking especially since it has so much impack on your job.
next: I studied so much but I just know the questions will be about something I forget. Oh well, guess I will just try my best.