OP,
I also think bringing someone with you would be very wise.
It would certainly put her on notice that you are not as gullible and as easily manipulated as she seems to hope.
I think she has probably told you she thinks it best you remain out of the house indefinitely, snd that she will handle the eventual sale on her timeline.
I really hope you have heard the sage advice that has been given here.
She is NOT your friend.
She does NOT care about your wellbeing.
I, like others keep mentioning her turning you out to sleep in your car.
It is so unbelievable for a person to do this.
It is so morally wrong and abusive.
It's a first for me.
Keep reminding yourself of how little she must care for you, to do that.
You need to return to your home and arrange a reconfiguration of bedrooms in your home, so you have space while the house sale goes through.
She should no longer have access to your money.
Your salary should no longer go to a joint account if it does.
Separate your finances immediately.
Legal advice.
Financial advice.
Contact the Estate agent that sold the house to you, to move things quickly.
Get support IRL from family and friends.
Do NOT be embarrassed.
By facing this calmly and clinically you can get through this.
Try to manage your emotions the best you can, they leave you very vulnerable to being taken advantage of.
Lastly, be very wary of a sudden reversal of her requiring space when she realises you are not quite the mug she thinks you are.