What do I do? my crazy dysfunctional family is coming down and I don't want to deal with it. I feel stressed and I just want this to be over so ican see my doctor in Monday and feel better so how do I deal with this? Am I going to be alright?

Ignore them as much as possible. Put yourself in your Happy zone and don't let them get to you.  It's only two days you can do this.

There is no law that says you must admit family in to your house.  Nor that you have to put up with their crap, if you choose to admit them to your residence.

Remember: Your house, your rules.

You can always hide out in your room also. YOUR mental health is more important then being sociable with them. You are not responsible for THEIR happiness! Just as they cant be held responsible for your UNhappiness. I'd take a mini vacation in your room.

Write a story plot for a television series.

Tell you a secret. You are not alone...everyone's family is dysfunctional to some extent.

It might be an unpleasant visit, but I am confident you are going to be alright.

Try to engage (interact ) with them as little as possible with regard to any discussions beyond the current weather and "Good morning/evening, etc.,"

Be sure you keep appropriate boundaries that will protect you.  You come first this weekend.