I'm sorry to hear about your situation. You unfortunately have to continue to pay your landlord until the trustee sale actually takes place. At that point your lease is no longer valid. What you can do is either talk with the owner directly or contact the trustee to find out what is happening and if the sale will be taking place, canceled or postponed. In the meantime, it would be wise to start locating a few alternative places to rent. Also, I would use the services of a real estate agent when you decide to finalize a new lease. I'm sure the last thing you would want to happen is to be in this same situation again.
Best of luck!
If you just sit there and don't do anything, you'll eventually be faced with a notice that you're being evicted. This can be unpleasant since you might not be given much time to move.
As for you not paying rent to your landlord, you'd probably be better off consulting an attorney for advice. If you can find out who ends up owning the home, you might be able to get them to rent it to you.