It's been almost four days since I had a cold war with my husband (sleeping in separate rooms) What should I do?

Communication between husband and wife is very important. He may not know that you are waiting for him to apologize to you. Don't let him guess your thoughts. After a long time, he will think that you are persistent and unreasonable, and the cold war has affected the relationship between husband and wife. Not all men are considerate and can express themselves. You can directly tell him your attitude, tell him what you really think, and let him formally apologize to you and end the cold war as soon as possible.