It is usually the injured party who adopts the no-contact rule, as a means of recovering from the breakup. You husband has admitted cheating and advised you he wants some space to figure out what he wants. This is why he has not contacted you.
You should also be using this time constructively, to consider how you feel about his infidelity. Do you truly believe that you can forgive him and, if so, will you ever be able to trust him again? You also need to consider any underlying problems in your marriage and determine if these may have led him to stray.
If you do decide to reconcile, I strongly recommend you both attend marriage counseling, to help you overcome your husband's cheating. In the meantime, use the time wisely and ask yourself if you really want him back.