I would say keep checking. I checked non stop for about a week and got a date two weeks out. You can also choose another consulate if you find that. I think they are now more flexible because of the pandemic. I chose another consulate but emailed them ahead of time. They said it was no problem. When I showed up for my interview, they took an extra 30 seconds to change my DS160 information to the current number. I don't know if the same rules apply to all locations. Email them to confirm.