We get a lot of questions about Lease/Option on Trulia;
and I am quick to caution people about the pitfalls of doing that:
It would sound to me that that is basically what you had, and it really fizzled on you.
I would hope that potential Buyers would see this and maybe be forewarned.
No matter how you got to where you are; you are in the situation that a lot of Tenants find themselves:
The Banks all listen to beat of their own drummer, and we cannot predict when the axe will fall:
What you are looking for is the Notice of Trustee Sale, pinned to your door. That could arrive soon, or maybe, later.
I would be that you have a while; but that is just a W.A.G.
When the Trustee Sale is scheduled; and assumiong that the Bank buys it back, (odds are), then you will have 2-5 weeks before their Listing Agent knocks on your door, negotiates with you and gives you 30 days to exit. This may/should include Cash-for-Keys.
In the meantime, save every penny you can; you will need it.
Good luck and may God bless