I dont have a lease anymore, do i still have to pay rent or can i just abandon my apt?

Ever since I had won a small claims court suit against my landlord(from hell) she has been out to get me she is a vile shrill evil woman with the maturity level of a 13 year old and also sends the police to my door because its appearently illegal to walk around in my own home or flush the toilet after 10 pm. but that's beside the point, she claims I still owe one months rent but the affidavid I was given did not say anything about it, I paid the full amount on the afidavid and appearently have been living here without a lease. My copy of the lease expires in april on the first but she once again posted a five day notice for me to leave on the fifteen of march, after I pay the rent for march, plus the supposed one months rent. And somehow my security deposit has vanished(which should cover the mysterious one months rent even if I DID owe it) If I don't have a lease do I have to pay rent people I've asked have told me I don't owe that bitch anything(exact words)? I really just want to leave on the fifteenth and leave the keys on the kitchen counter and not even bother with the security deposit.