Stressing on the Nursery!

So a lil Rant! But I’m wondering what you would do if you were in this situation!

My boyfriends sister had to move in with us (she’s leaving two or three weeks before my due date) and is storing all of her extra stuff in the “guest room” which I want to turn into the nursery, and we need to break down the bed that’s in there, clean out all the other furniture in there, get new carpet and put it down, I need to clean the walls and make sure the window is sealed properly and then obviously decorate and I’m so stressed about all of the stuff and she just keeps throwing more in there!! My boyfriend doesn’t seem as stressed but I’m 23 weeks and I just see the time span shrinking very quickly and I know baby girl won’t be in there until she’s about 4-6 months but I want it all done before I have an infant and toddler schedule that I have to work around.

What should we do, she’s very self centered and I’m trying to avoid the drama but damn! He told me just to throw everything out of there and start but where the hell do I put it!