Common problems - 2002 Ford Super Duty F 450

I am in a very precarious situation. I had to resign from my position working for the county of san diego, due to PTSD. My disability was exhausted in april and had to apply for Federal long term disability. My disability may b manageable at some point in the future, but for now i am unemployed, on County Aid, and persistent in continuing my treatment. Now, /when my i ran out of funds, i had no place to go and a peer i met in 'sober living' suggested i move in with her to care for her temporarily as she was having surgery...I moved in April 2014.....then in exchange for housing, she suggested that i care for her three pets and the home....while she is incarcerated for a period of less than two years....i agreed reluctantly...i have signed on to the month to month lease.....i have not paid rent but have supplied food, allowed her use of my car, and housekeeping. the situation has become very scary and of course is a result of my choices in desperation and not dealing with a full deck of cards....she has exhibited agressive behavior and i feel that i am verbally harassed and stalked. So much more, but the bottom line is: what are my rights (i have not directly paid for rent) and liability (as isigned the lease) and do i have remedies should she continue her behavior till she is incarcerated. i am trying to find housing...actually since i came here in april....thank you for your time...