YANBU. Me and DH haven't been out since 23rd December. Got in bread, milk, and fresh salad and veg, and have enough frozen, and non-perishable food to feed an army.
We went on a big family Christmas lunch (on 21st December,) with 18 extended family members, then had our DC and their partners around on Christmas Eve for 3 or 4 hours, then they went to their partners family on Christmas day.
Since Christmas Eve afternoon, me and DH have just been chilling and relaxing and watching TV, eating crappy food, and drinking wine and whiskey and playing video games and board games and having lots of fun with each other. (Been doing this for 5 days.)
We were going to go out today, but realised there's nothing we need.
Going to a big party on New year's Eve at a pub 20 minutes walk away, that loads of people we know are going to (incl our 2 DC and their partners,) and they will be staying at our house til New years day.
We really have no need to go out, and it feels really good to not have to go anywhere. No work til 6th Jan for any of us. 
We will probably pop out tomorrow afternoon for some fresh bread and some milk. Be out an hour tops... Then won't go out til NY Eve, (for the party.)