Hi Helend,
Welcome back Helend... .so sorry it's under such stressful circumstances. You'll find by poking around and reading the stories of others that you are not alone in your struggles. Do you have anyone for support during this time? Being alone in these circumstances can feel very confining, do you have a therapist that you see by chance? Many here have found a professional to help guide them through some of the obstacles in our lives to be very helpful.
One thing many of us have learned is that we cannot change our person with BPD, but we can change how we react to and communicate with them. The tools and lessons in the right margin of this page are in place to help you learn how to do just that.
It sounds like your daughter does not live with you, is that correct? Feel fee to share any thoughts, feelings or questions... .we are here.