I’m going to travel for a week, please don’t think about it. How do you say it in English?

There are many ways to translate this in English: I will give you a reference here:

“I am going to take a long trip, that it may take a week. If there is "anything that you need me to deal with, please wait me back"

The translation of this sentence is more written and uses subordinate clauses. Suitable for more formal occasions, such as "your teacher", "your unfamiliar friend", "your boss", etc.

The translation of "I am about to travel for a week, please don't miss me" is more life-oriented. It is basically a "simple sentence with subject, predicate and object". There are no clauses and no excessive sentences. Formal vocabulary.

The translation methods are different. There are 2 options available here. You can choose between them.