@Aya dh ,
When you say a few days I assume you mean maybe 3 to 5?
You can't deal for that long?
Whenever I am not looking forward to something, I'll think "In 24 hours (or whatever) all this will be in the past.
Think of the time you're wasting now stressing about it, and the time they'll actually be there. Then, when they're gone, so is all that time you could have been peaceful and content.
And there they are, your cousins renting space in your head, not even knowing right now you're thinking about this. That's kinda dumb.
Pain is inevitable, but suffering is optional.