Oh my gosh. Oh honey. I just want to give you a hug. That's a lot to deal with all at once. Take a deep breath and know that you CAN handle this.
First, it's totally okay if you find out that you didn't do so hot on the SAT. You can prep for it differently and take it again. Colleges only care about your highest score, so don't feel bad. Sometimes people are really sick, having an off day, or just get overwhelmed taking the test and don't do so great. Your score does NOT define you. At all. In any way. You are more than three values. Even if you can't take it again or decide not too, SAT is only one aspect of admissions. They look at other things too.
I am SO sorry about your dad. That has to hurt, and I feel for you and your family. If you do have to find a job, you will be able to, and moving isn't the end of the world. It's just a lot of life changes at once. Take it one step at a time and focus on the things you DO have control over right now. Don't worry about the other things you may have to deal with later. Just stay in the present and know that no matter what happens, it will be okay. You will be able to make this work.
I am thinking of you, little sister.
__________________
Never forget how loved and beautiful you are!!!