Should We Postpone?

Today is my husband and I’s five year anniversary. He took off work so we could spend the day together and go out on a date but I have an upper respiratory infection and I’m really not feeling up to going out to a restaurant for dinner. I know if I tell him I don’t want to go today he is going to be really disappointed and honestly so will I. I really want to go. I just don’t feel good. What would you do? Would you suck it up and go anyways? Or would you postpone the date until the weekend?