(((Candy))) I will support you no matter what decisions you make.

I'm concerned with the environment you are going into though. Is this the way your life is going to be run, or is your sister acting out of frustration and wanting to help and get this done? I'm cautious that she is taking you in but doesn't understand your handicap in trying to close things up completely within 3 weeks??? (It took me over 6 months to pack, and that was after I knew I would be moving for certain!)

Obviously if you run on her time table, you will have to alter yours.
If you decide to alter yours, then do your best. Call and see if you can see your pdoc ahead of that time. Hire someone in for a day to help you pack (Psych central has a fund, I am willing for you to use some for this.)

However, if this timetable of your sisters just doesn't cut it for you, then tell her, NOW. See if there are other accommodations they all can make? Sounds to me like they are squeezing you in between some of their own activities. While that might be fine for them, it doesn't sound like they really understand what you need, and don't need.

Can you reevaluate what you said in the email you DID send her? Sounds to me like she overreacted. (((hugs)))