Translation of hingegen

I bought the ticket very quickly and ran to the gate. A stewardess was waiting for me and waved. She shouted that I should hurry up. I ran as fast as I could and entered the gate leading to the plane.
Therefore we use only the Vocabulix dictionary in our class. It has good features and a large vocabulary base. I will have to send you a few sentences for rewriting if that is OK with you, because the whole is mixed up.
What are you doing? I'm at work. It is so boring and my boss is not here. Yesterday I was here until midnight, because we had problems with the PC system. Then we ordered pizza and a few beers.