If it was me, I'd look for a place now & get out of there before it comes to bailiffs/court orders etc.
Perhaps I misunderstood the initial post: your lease expired in November, but you're still paying her rent without having signed a new agreement? Then you're not under any obligation to honour notice periods etc, or even keep paying rent (anyway, by going incommunicado, the landlady doesn't deserve to receive your money). I'd run, not walk, away from this situation unless there was a VERY good reason to hang on (e.g. rent MUCH cheaper than anything else you can get...)