Translation of sich sorgen machen

Mr. Chang informed me that you have a customer that requires similar applications to what my customers have here in Switzerland. I am planning my next trip and I will consider visiting you too.
She even compares the hills across the station with the belly of a pregnant woman by saying that they do look like white elephants. Maybe she thinks that way but I am not really sure about that.
He started to shout and to curse at my wife and me, but we did not give him additional money. I am convinced that he knew exactly that he did not take us to the original hotel but to a fake one.