by herself, only herself, on her own?

[Nevertheless]

tell me please which one is correct: she was sitting at home ...
by herself, only herself, on her own, or other. P.S. the meaning is that none esle was in.

[Beeesneees]

She was sitting at home by herself.
She was sitting at home on her own.
She was sitting alone at home.
_________________
Cheers m' dears!

[Allifathima]

Beeesneees,
1. She was sitting at home by herself.
2. She was sitting at home on her own.
3. She was sitting alone at home.
Do #1 and #2 mean #3?
Can I not say:
4. She was sitting alone at home by herself.

[Beeesneees]

The first three all mean the same.
The fourth contains a redundancy. You don't need 'alone' and 'by herself'.
You can also say:
She was sitting at home, alone.
_________________
Cheers m' dears!

[Nevertheless]

ok, thank you all, guys, i decided that "she was sitting alone at home" is the best one. D: