This week must end NOW!

Ok now I have my daughter coming home....to some this is a good thing, but this child is 22 and brings with her my grandson. I love that he will be home, but I just don't know how I am going to handle all this stress. 2 graduate classes, a new puppy, my other daughter being deployed to Iraq, and a job that is about to get really stressful!!!! How do I do this?